We have got some water colours some acrylic paints we've got lots ... For a different effect why not use a toothbrush? You can use this to sprinkle paint onto your painting. So I'm going to ...
Acrylic paint ... or paint. It can then be peeled off or removed with an eraser. Sponges can be used to lift out areas of paint. Using a moist or a dry sponge will change the textural effect.