I experimented with clearcoats on my last frame and it worked out nice. I found a few foums for auto painting that gave me great tips. I got a can from an auto parts store that was meant for engine blocks and it went on pretty good. I was told to let the frame sit for a week to harden (something about spray can enamels needing more time). Then I wet sanded the frame with 2000grit sand paper and then took some turtle wax polishing compound to the whole frame and it came out with a great gloss finish.

It was probably too much work, but it is still winter in New England, so...