Originally Posted by Automaster
If I where you, I would take SoN advice and check out the tuts on youtube, but to answer your question, that is why you clear coat your base color first before washing, AND why you use different types of paint.
What I do, is no matter what I paint with, I clear coat with the strongest clear I can (keeping in mind that a Lacquer clear will burn acrylics if you are not extremely careful) and then I will actually USE the future to make the wash. Using a 6:1 ratio future to paint usually works for me. What this does, is give the acrylic paints the "self leveling" properties of the future, as well as the "24 hour full cure" dry time, and makes it so by the end of the curing stages, the only parts actually showing the wash are the lower parts.
As for "how to apply" you will find that you get better flow going AGAINST the grain of the folds your trying to wash rather than WITH them. Panel lining is one thing, as you stay between the lines, but when washing your going for coverage of a lot more areas. Going against the grain enables you to apply the next pass of wash without pulling out what you just worked into the fold NEXT to the one your brushing...
Hope that doesnt sound TOO confusing...lol