nt on it, or by so diluting the paint with solvent (not oil!) 
that it can actually dry in just a few minutes. If you need to layer paint on 
top of thicker paint than this, you can use a medium such as oil to make the top 
layers more fluid, which can help it stay on top. You may also find either 
softer brushes or a knife can make applying paint on top of wet paint easier. 
But you should also consider simply expecting some mixing of layers to occur, 
and in fact to depend on it. For example, if the