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Top coat suggestion in humid conditions

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Cubcrazy

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The time has come for me to finish off one of my projects,My problem is the covering was done with Ceconite and Randolph dopes,painted up to silver on some of the surfaces and some to a base coat of white butyrate,
I have recently relocated to NW Arkansas where the temperature and humidity are not conducive to continuing with butyrate dope due to the blushing problem.
Retarder has been suggested but this does not seem effective in 80% plus humidity.Any suggestions how to move forward?The project is experimental so I am willing to mix and match.So in short I need a top coat that I can spray in humid conditions that will be compatible with butyrate dope.
 

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