I'm looking to shoot my first overall paint job on a 77 Chevrolet k20 pickup in my garage. It's not a daily driver but not a total resto. I've done my best to make it look straight with all spi epoxy and (panel straightening compound) lol . With limited skills ,i don't expect a mirror finish like the folks on here, but i was wondering which spi clear would be the most rookie friendly? I'm probably dreamin but I would like to do three coats and call it good, how many gallons would I need to do all the outside (long bed) and door jambs minus inside the bed?