One word of caution, the solvents in the base coat will lift the clear. Probably makes no sense, right?
Lets say you've layed down your base coat and then you clear it. You go to town wetsanding the clear to remove the orange peel and accidently go though the clear and base coat into the primer. No problem, touch up with some base coat and re clear, right? Well, the base coat will act like paint remover on the fairly fresh clear coat and wrinkle it up.