You really want to read the Mar K test results, the only finish that lasted was POR 15 black with baehr uv inhibited black. If your truck is going to be outside all the time none of the fancy clear coats held up.......here is how I am finishing mine because of those results.

http://kieth.smugmug.com/Trucks/66-GMC/13311086_gRF57#1156429224_ovJCN



66 GMC SWB
65 Chevy LWB
65 GMC SWB

918-446-2245