Liquid Basecoats are essential to the Bob Ross Wet-on-Wet Technique. They allow you to actually blend and mix colors right on the canvas. They can also be used to thin other colors for application over thicker paints. The idea that a thin paint will stick to a thick paint is the basis for this entire technique. This is your take anywhere supply of Liquid White, Black, and Clear plus FREE Ross Brush Conditioner! Portable 100ml bottles fit in any bag or box.