Rbeckey:
DC is one of the worst places in the country for humidity, and while this spring has indeed been warm and wet. I'm having a real problem understanding your dilemma.
Woud you please, explain EXACTLY what your finishing problem is?
Heres a few questiions that well help narrow the search.
Where do you paint your models EXACTLY?( inside, outside, in direct sunlight or shade. in an enclouser or in the open.)
How do you prepare your models for paint? ( Primer(s) used, sanding method and dust removal method. )
What do you feel is the problem with the finish on your models? (orange peel, crazing, checking, hazing, paint lift)??
I can't for the life of me think of any reason you would be having a problem with Krylon.. it is no more "humidity sensitive then any other "Harry Homeowner or hobbiest" spray paints. Rustolium, Duplicolor, Color works, Pactra, Testors, Easy living, Smooth & Silky(K-Mart), Sherwin-Williams, and Mattos industrial automotive spary paints all have there own quirks but are all formulated for use by john Q public, in normal everyday weather/humidity conditions.
I'll be watching for you comments.
OBTW Dynasoar:
Most metallic, mirror and hi gloss finishes will not allow clearcoating. Solvents in the clear break up the interlockng platelettes turning your mirror chrome into a dull grey. There are a few special formula clears that will not attack certain mirror finihses but they are every product specific and hard to find.