@Bryant Dunivan 111417 posted:Tamiya dullcote is the only one I use. The sacall it a synthetic laquer. Never a problem. I gave uip on solvcent based and Testors. Humidity will work against you as previously mentioned.
Bryant, you hit the nail right on the head. The Testors Dullcote of today is different somehow. What used to be a very forgiving dull coat has turned into an often problematic spray. I would advise Mike to gently sand the area with very fine steel wool and apply Tamiya Dullcoat. The Tamiya is hands down a better product, and has never reacted badly to any type of paint base I've laid down... whether it be from an airbrush or a rattle can. I had used Testors for decades, but I fixed a F117 model that exhibited the same blotches on your roof by simply switching over to Tamiya. I didn't even scuff it up first. That made me a believer.
