No excessive paint coats, plasti-dip, or epoxies used. Some very small holes where my super glue separated were filled with elmers glue. I did use a softer foam than most use (I believe) which allows for better flex at splices and rounded areas. Do a search for my posts on the rpf and I threw up a link for the foam I used. (It's 1/4" closed cell cross-linked polyethylene foam from "the foam factory".) Hope this helps you in your future builds.
Also, check out durkness' posts here on the rpf for different foam splicing techniques. He is a foam wizard! Also, join the "pepakura depository" (durkness is the admin) on Facebook for group foam postings, general technique advice, and encouragement for your builds.
Happy building!