Always wanted to do this. It took me 7 days to prep but I just got done painting with rustoleum 2x and spraymax 2k clear. 150 bucks total. Not perfect, but mine. :
USC Spray Max 2k High Gloss Clearcoat Aerosol (2 PACK) - Walmart.com
Amazon.com: Spray max USC 2k High Gloss Clearcoat Aerosol (6 PACK) : Automotive
1k vs. 2k Clear Coat - Which is better? - ERA Paints