I'm powder coating my forks in a couple days. I saw a write up a while back where someone had done this and didn't see if there were any issues sliding the forks back in the triple clamp.
i just powdercoated my forks last week. Still havnt filled them with oil but i have slide them in and out of my triples a few times to measure things since i was using the forks in X1 triples.... Sliding them in and out carefully only left a very few MINOR scratches in the mounting areas only. Nothing you can see. I have since decided to use XB triples and ordered them, still waiting