Does Polyurethane Paint Stick Over Self-Etching Primer?
Like many before me, I am using the Napa 7220 self-etching primer on the outside of many skins so that it offers a little protection and looks acceptable prior to being painted on down the road.
A composite builder friend of mine suggested that painting polyurethane paint (or any other good aircraft paint) over the self-etching primer was a no-no, as the primer could cause the paint to lift.
For those that have gone this route, is that a problem? In general, I'm trying to understand if there will be any problems down the road when it comes time to paint if I use the 7220 now. Obviously, I do not want to have to remove all of the self-etching primer later on.