Rawlins Paints Blog Industrial Paint Tips, Guidelines & DIY Articles
Spray Paint Tips
Have you ever struggled with streaks, drips, or an uneven finish when using spray paints and aerosols? You’re not alone. Aerosol spray paints offer tremendous convenience, and you can achieve a professional finish by using the correct techniques and having a proper understanding of the product. With a few expert spray paint tips, you can easily master spray paints and aerosols for any project.
In this post, we’ll share five crucial tips to help you get the most out of your spray paints and aerosols. By the end, you’ll know how to select the right products, apply them with precision, store them correctly, stay safe while working – and how to paint with spray paint.
Understanding Spray Paints and Aerosols
Spray paints and aerosols are popular choices for both professionals and DIY enthusiasts. They combine ease of use with the ability to create a smooth, even finish. But what exactly are they, and how do they differ from other painting methods?
Spray paint is paint in liquid form that is stored in a pressurised aerosol can. The paint is mixed with a propellant (typically a compressed gas) that allows it to be sprayed as a fine mist when the nozzle is pressed. This makes spray paint perfect for covering large or intricate surfaces quickly and evenly.
Aerosols are unique because they don’t require any additional equipment, like air compressors, hoses, or spray guns, which are often necessary for more complex spraying techniques. This portability and ease of use make aerosols popular for painting metal, for example, with spray paints. These can range from small DIY projects to professional tasks such as automotive refinishing or industrial machinery maintenance.
It’s important to note that aerosol spray paints differ from other types of spray systems, such as:
Air-Assisted Sprayers
Using compressed air to atomise the paint into fine particles. While they offer excellent control and are commonly used for detailed work, they require a lot of setup and maintenance. For casual DIY tasks, aerosols are a simpler option and more convenient..
Airless Sprayers
Works by pumping paint at high pressure through a small hole, creating a spray. They are highly efficient for covering large areas but lack the portability and precision of aerosol cans.
DIY Electric Sprayers
Handheld tools are ideal for larger home improvement tasks, such as painting fences or sheds, but still require preparation (such as thinning paints) and cleaning compared to aerosol cans.
Hand-Pumped Sprayers
Relies on manual pressure to force liquid through a nozzle. They’re often used for outdoor tasks like applying wood treatments, sealants, or pesticides. While inexpensive and simple to operate, they lack the power and control of electric or air-based sprayers. Requiring regular pumping can be tiring, and they struggle to handle thicker paints. This makes them more suitable for applying light coatings or treatments.
In comparison, aerosol spray paints are pretty much set-up and go. They come self-contained, require no external equipment, and are versatile enough to be used on a wide variety of surfaces. You can find metal spray paint, wood, plastic, concrete, and glass. Whether you’re touching up a bike frame, painting a set of metal chairs, or updating uPVC with spray paint , they provide a quick, easy solution.
But while they are convenient, there’s more to using them effectively than just pointing and spraying. The following spray paint tips will help you achieve the best results and avoid common issues like drips or uneven coverage.
Tip 1: Choose High-Quality Spray Paints and Aerosols
One of the most important aspects of any spray-painting project is selecting high-quality products. The quality of the paint you use will directly affect the final result, including the finish, durability, and longevity of your work.
High-quality spray paints, such as those from brands like Maston, Rust-Oleum Hard Hat, and CombiColor Original Aerosols, are designed to provide superior adhesion, coverage, and durability. These brands utilise high-grade pigments and resins to ensure that the paint bonds effectively with the surface and remains vibrant and resistant to wear over time.
Using premium products can also help you avoid common problems like cracking, fading, or peeling, especially when the painted surface is exposed to harsh elements like UV light or moisture. Additionally, high-quality paints tend to spray more evenly, reducing the chances of overspray, streaks, or patchy coverage.
For example, Maston’s 2K spray paints offer an advanced two-component system. It requires no prior mixing, months of shelf life after opening, 4,400+ colours (including anthracite grey), and provides industrial-grade durability in a convenient aerosol form. More on that next.
Tip 2: Understand the Differences Between 1K and 2K Spray Paints
When it comes to spray paints, there are two main types to choose from: 1K (one-component) and 2K (two-component). Understand the differences between these two options to select the right product for your specific project.
1K Spray Paints
These are single-component paints that are ready to use straight from the can. They do not require any mixing or activation, making them incredibly easy to use. However, while 1K paints are great for many DIY projects, they are not as durable or chemically resistant as 2K paints. They are best suited for projects where extreme durability or chemical resistance isn’t required, such as furniture, decorative items, or small touch-ups.
2K Spray Paints
These are two-component systems that include both a base paint and a hardener. The hardener reacts with the base paint to create a chemical bond, resulting in a much tougher and more durable finish. 2K aerosol paints typically have a tab or “key” on the base that, when turned, snaps the base and hardener together and begins mixing them in the can. This then needs to be used within a specified time before the product hardens and any leftover materials thrown away.
However, Maston’s 2K spray paints have simplified this process by incorporating the hardener directly into the can. The hardener is released and mixed with the paint when sprayed, activating on contact with air. This eliminates the need for manual mixing and extends the product’s shelf life to many months. With Maston’s 2K sprays, you get all the benefits of a 2K system, such as superior resistance to chemicals, UV light, and abrasions, without the complexity or limits of traditional 2K aerosols.
This makes Maston’s 2K spray paints an excellent choice for high-performance applications where durability is critical, such as automotive repairs, machinery, or outdoor furniture exposed to the elements.
Tip 3: Master the Technique of Applying Spray Paints
Getting a professional finish with spray paints and aerosols requires more than just spraying the surface. Mastering the right techniques is essential to avoid common issues like drips, uneven coverage, or overspray. Whilst we talk about how to get it right, always ensure you read the manufacturer’s application instructions in the relevant data sheet.
Surface Preparation
Before spraying, ensure that the surface is clean, dry, and free of any dust, grease, or rust. A well-prepared surface allows the paint to adhere better, resulting in a smoother and more durable finish. If the surface is dirty or oily, the paint will struggle to bond, leading to flaking or peeling down the line.
Masking Off Unwanted Areas
Spray paint can spread beyond the area you’re targeting, leading to overspray on adjacent surfaces. To prevent this, always use painter’s tape (such as masking tape) and protective materials like newspaper or plastic sheets to mask off areas you don’t want to paint. This ensures that only the desired area is covered, giving your project a cleaner, more professional look. Also be aware of weather conditions and avoid using spray aerosols paints on windy days.
Shake the Can Thoroughly
Spray paints contain a mixture of pigments, solvents, and propellants that need to be well-blended for optimal performance. Shaking the can vigorously for at least two minutes before each use ensures the paint is properly mixed. This helps prevent uneven spraying or clogs in the nozzle. If the paint isn’t mixed properly, you may end up with inconsistent coverage or a streaky finish. Some spray paints ask the users to also shake the can upside down, and in-between sprays.
Spray in Light, Even Coats
Many people make the mistake of applying too much paint at once, which can lead to drips and runs. Instead, apply multiple light coats, holding the can about 25-30cm from the surface. This distance helps ensure that the paint mist settles evenly on the surface, reducing the risk of overloading any one area. Each coat should dry completely before the next is applied to prevent pooling.
Allow Sufficient Drying Time
It’s tempting to rush through the project, but patience when using spray paints is key to achieving a professional finish. Allow each coat to dry according to the manufacturer’s instructions before applying another layer. Skipping this step can cause the paint to sag or form wrinkles as it dries, ruining the smooth finish you’re aiming for.
By following these steps (and the manufacturer’s instructions), you’ll avoid the most common spray-painting mistakes and achieve a smooth, flawless finish that looks professionally done.
Tip 4: Proper Storage and Maintenance of Aerosols
After you’ve finished your project, proper storage of your spray paints and aerosols is critical for preserving their usability and effectiveness. Poor storage practices can render an otherwise perfectly good can of paint unusable the next time you need it. Here’s some spray paint tips you need to know:
Clear the Nozzle
One of the most important things to do after using spray paint is to clear the nozzle. To do this, turn the can upside down and spray until only clear gas comes out. This process flushes any remaining paint from the nozzle, preventing it from clogging. A clogged nozzle can make the can unusable later, so this simple step saves you from future frustrations.
Store Upright in a Cool, Dry Place
Aerosol cans are sensitive to temperature extremes. Storing them in a hot environment can cause the can to expand and possibly rupture, while freezing temperatures can thicken the paint inside, making it difficult to spray. Always store your spray paints upright in a cool, dry place, away from direct sunlight and sources of heat. Keeping the cans upright also prevents leakage and ensures that the paint remains evenly distributed inside the can.
Maston’s 2K Spray Paint Longevity
Traditional 2K spray paints need to be used within a few hours – sometimes as little as just 30 minutes – after mixing, but Maston’s 2K spray paints are different. Thanks to their unique technology, these aerosols can be stored up to months after activation. The hardener is deactivated inside the can and activates only when sprayed, reacting to the humidity in the air. This activated hardener then reacts a second time to the 2K resin on the surface of the substrate, typically 15 minutes after application.
Maston’s new age technology 2K spray paints provides untold flexibility and helps in reducing waste. Because the hardener is inert inside the can, open aerosols can be stored after use for several wells or even months, whereas traditional 2k sprays have to be thrown away. This helps professionals cut down on buying new spray paints for each project as they can store partially used Maston cans for future projects.
Tip 5: Prioritise Safety When Using Spray Paints
While spray paints and aerosols are easy to use, they also pose safety risks due to the chemicals and propellants involved. Following proper safety procedures is essential to protect yourself and those around you. Always check the manufacturer’s safety data sheet for more details on chemicals and what to do in an emergency.
Ventilation
Aerosol paints release volatile organic compounds (VOCs), which can be harmful if inhaled, particularly in large quantities. Always use spray paints in a well-ventilated area to avoid inhaling fumes. Working outdoors is ideal, but if you must spray indoors, open windows and doors to allow fresh air to circulate. Using a fan to help direct airflow is also a good practice, as it helps dissipate fumes more quickly.
Wear Protective Gear
To protect yourself from paint fumes and particles, it’s essential to wear the right protective gear. A respirator mask designed for paint fumes will protect your lungs, while safety goggles shield your eyes from paint mist and debris. Wearing gloves is also advisable, as some spray paints contain solvents that can irritate your skin. Long-sleeved clothing can provide extra protection against accidental spray exposure.
Avoid Open Flames
Spray paints and aerosols are highly flammable due to the propellants they contain. Always keep your spray painting area away from open flames, sparks, or other ignition sources. Be mindful of nearby gas appliances, and never smoke while using aerosols.
Never On A Windy Day
Because of how spray paints are applied, never use aerosols on a day with high winds and gusts. Improper application will affect the finish on the substrate, and the paint can be blown onto other surfaces, wildlife, or people not wearing PPE.
Dispose of Cans Properly
When you’re finished with a can of spray paint, dispose of it according to local regulations. Aerosol cans are pressurised and can be dangerous if punctured or exposed to heat. Never throw them directly into a fire or attempt to open them.
By following these safety precautions, you can ensure that your spray-painting projects are not only successful but also safe for you and the environment.
Conclusion
Spray paints and aerosols are fantastic tools for achieving a professional finish on a wide variety of surfaces. By understanding the differences between 1K and 2K paints, choosing high-quality brands like Maston, Rust-Oleum, and CombiColor, and mastering proper application techniques, you can ensure beautiful, long-lasting results on every project.
Don’t forget to follow safety guidelines and store your aerosols correctly to keep them in top condition for future use. If you have any questions or need further assistance, feel free to leave a comment below, and one of Rawlins’ technical experts will be happy to help!
Spray Paint Tips: FAQs
Can I use spray paints and aerosols in cold weather?
Spray paints generally perform best in moderate temperatures. Cold weather can cause the paint to thicken and the propellant to become less effective, leading to poor spray patterns and longer drying times. Always check the manufacturer’s recommended temperature range on the can before spraying.
Why is my spray paint finish rough or grainy?
A rough or grainy finish is usually caused by spraying from too far away. The paint mist dries before it reaches the surface, resulting in a textured finish. To avoid this, hold the can about 25-30cm from the surface and spray in even, overlapping strokes.
How long should I wait between coats of spray paint?
The drying time between coats can vary depending on the type of paint, the thickness of the coat, and environmental conditions. In general, wait at least 10-15 minutes between light coats, but always follow the manufacturer’s instructions for optimal results.
Can I apply a clear coat over spray paint?
Yes, applying a clear coat over your spray paint can provide added protection and a glossy finish. Make sure the base coat is fully cured before applying the clear coat, and use a compatible product for best results.
How do I prevent spray paint from fading over time?
To prevent fading, choose high-quality spray paints that offer UV protection, such as Maston or Rust-Oleum Hard Hat. Additionally, applying a UV-resistant clear coat can help preserve the colour and finish of your project, especially for outdoor use.
What should I do if the spray paint nozzle gets clogged?
If the nozzle becomes clogged, try cleaning it by soaking it in warm, soapy water or using a pin to remove dried paint. To prevent clogging in the future, always clear the nozzle after use by turning the can upside down and spraying until only clear gas comes out. If the nozzle remains clogged, you may need to replace it with a new one.