I have been told to use a solvent based masonry paint (pliolite) on the outside of my L shaped garage, which has just been converted into a painting studio. What colour range is available to me in this kind of paint? I need fifteen litres. Is it possible to mix a colour? Can a waterbased masonry paint be colour washed as a top coat on a white pliolite base, or would that be unstable? It would be very helpful and I would be very grateful if you are able to supply answers to these questions....thank you! Karen Popham