dont know if comart is suitable for plastics though???? is it lightfast? comart is very thin and perfect for spraying straight out of the bottle with a decent size nozzle, but to be honest most water colour acrylic paints need some reduction./thinning before they will spray how you would like. wicked is an excellent paint as its lightfast, strong durable, vibrant colours and suitable for every kind of surface, from paper to metal.... there are a few members fromk S.A here widutoit!, ANDREZA is one and a very knowledgeable helpful member, he may be able to help you source some paint.