I've used DN over Wasco paint quite a bit. The first time I used it DN peeled the paint right off before I finished a brush stroke. I heat set the second bait and it worked out fine. I've found if you will spray some automotive clear over the bait before applying the DN you will get a smoother looking finish. Just don't expect to get the same look from DN that you get from 2-ton or etex. It may be tougher, but it doesn't look as pretty in my opinion.