I'm like Kent. I trim everyting scuff it back down then assemble and refinish. this way everything is sanded completely and theres no chance of paint peel along the edges. It also gives you good coverage where the panels bolt together and reduces any risk of bare metal rusting. Keep in mind, even if your ride never gets driving in the rain, the temps outside still change and can cause condinsation in places that typicaly would never get wet. you want to protect everytihng.
