Most of that crap turns yellow too. It's garbage for projects that need to look good and sit outside in the sun all year. Gun is way to go. Get a starter kit from Harbor Freight or something. It'll be dirt cheap and tons of fun!Sounds like you should just cover it in a gloss clear coat. You'll probably want to have it properly sprayed with a gun though. Canned clear sucks, it's soft and it fogs up. Clear really needs a hardener mixed into it right before spraying.