I have been using acme auto clear from napa. 4:1 with hardner. I first started top coating with devcon 2t, thinned with da, but switched to auto clear. I spray mine with a hvlp mini gun, and love it. I can clear 5 times as many baits in 1/2 the time. auto clear is a much thinner and clearer top coat. For the time and money, you can't beat auto clear. I just open my garage door and put a fan behind me, and spray.