HI
I also fly some controlline stunt and we have been putting urethane clear over dope for quite some time. PPG and other brands as well.
i have personally used it over buterate/nitrate/enamel/laquer/basecoat urethane/ and decals without any problems
it's a good ideato shoot a light coat over decals and let it setup for a few minutes before shoting the rest of the plane.
Dave.
by the way duplicolor touch up spray cans work quite well withut decanting. i believe they are laquer and yes i have used many of the colors in such a way.
these were both shot with "Transtar" high solids urethane clear wich is a less expensive alternative to PPG. there are laser printed decals on both of these planes and both have combinations of basecoat and laquer on them
Dave.