After finding some chipped paint spots on my test model that I haven't even completed (what the heck!!!), I stated thinking about putting varnish on it. What do you guys use? I have used the matte varnish spray that citadel makes in the past, but I am afraid of using it again as I live in such a wet area (Portland OR) and I know if conditions aren't perfect it can make the model look bad. Are there any other options?