Can you use chalk paint for wet room floors with a lacquer coat on top to protect it
The Rust-Oleum Chalky Floor Paint is not recommended for areas exposed to direct water contact.
Unfortunately we cannot recommend this product and over painting with a lacquer.
Assuming the bathroom floor is concrete, clean, dry, sound and prepared as detailed in the technical data sheet we can recommend Smartkote Safekote.
This is a bare foot friendly antislip paint available in clear or a range of colours in a semi gloss finish.