RE: For the paint gurus
Jerry,
there have been a lot of products and different types of paint mentioned above. Is there a specific type of paint or clear coat that you are interested in putting over nitrate dope?
As a general rule, acrylic lacquer will not like to go over anything other than a stable compatible primer or other lacquer. However, after revising Paul's table below, it appears that one could in principle shoot it directly over nitrate dope. In practice, I see no reason why one would want to do that as painting an unprimed model won't yield very good results. If one wanted to paint with acrylic lacquer over top nitrate dope, I would make sure there is a good primer sealer as a coat between the two. A primer sealer insures that the paint shot over top won't "eat" through the underlying layers but chemically bond only with that primer layer. Automotive paint is often acrylic lacquer so sealing primers are also well known and often used/recommended in the industry - at least that's the impression I have so far.
acrylic or alkyl Enamel is more flexible and will go over lacquer or enamel. Acrylic and alkyl enamels shouldn't be mixed but I would generally stay away from alkyl enamels as they are not as friendly or tough as acrylic enamels. Modern day enamels I believe are by enlarge made with acrylic resins - certainly the automotive paints. Alternatively they are epoxy based enamels. Finally, acrylic urethanes can go practically over any cured substrate provided it is clean and grease/wax free.
The dope that one has to watch out for is butyrate as it off gasses for a long time possibly lifting other coat applied over top. But then again, butyrate is often used as a finishing paint so it can be used as a single system. I'm not sure what's in Stixit or Balsarite type of "sealers" but I believe they behave in much the same way as nitrate dope in terms of what can go over them once cured.
I hope this helps, David.