if i'm not in a hurry, i like to wet sand the primer coat, then spray color and wet sand that....only if it's a solid color though, metal flake does not like sanding, then lay on the clear and wet sand each coat of that, then wet sand final coat with 2k or 3k, then polish with meguires products. for me, this seems to provide some depth and a lot of shine. i will say it was a heck of a learning curve.