I wetsand primer with 400, good 3m or similar paper. If it's painted areas, I used 600. If you don't use something than finer than 220, your going to see it especially with a metallic color.

When wetsanded with 400, you can actually see a little shine in good light and look it over for flaws too.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram