Oh, this is always the fun part! When the paint is dry (so that you don't accidentally scuff wet paint with strips of masking tape), do a quick inspection to make sure you really, really didn't miss anything. It would be a pain to reapply all that masking paint just for a few spots here and there, wouldn't it? Yes, it would be a pain. So when you're satisfied, peel off all that masking tape and revel in the moment I like to call "The Great Reveal!" "Ta-Daaa" you'll announce to anyone within earshot. Hopefully they'll come running over and pat you on the back, lauding your epic spray painting skillz.