2K High gloss works very well. Make sure 1st coat is a mist coat. 2nd coat light. They dry super quick and you won't get issues with the spray can color.
Have purchased two cans at a time, several times on Amazon, been the best deal so far. Very handy when changing sponson color. I have also used on regular urethane base coat with added stripes and /or stickers with great results.
I have talked to Eastwood about the 2k clear they offer and say its equal to the Spraymax product but the price is less....i used Spraymax clear and really like the product, but waiting for a new project to test the Eastwood version..if like anything else I bought from Eastwood...they stand behind there products and customer service is truly AWESOME....