If you're getting most of the bike powder coated, I'd take the time to disassemble the forks. Yes, it can seem like an overwhelming task, but its really not too difficult. There are many parts, but you really can't mess it up as most parts only go in one way. You'll need to create a tool to remove the inside damper bolt. I made one up, but I've seen on here someone used a coupling nut (tall nut) and that was a great idea, cheap too.
But, if you don't want to take them apart, use the Plastidip. I've never used it myself but I've heard a lot about it. I'm curious how it would hold up on the front forks. If you don't do a lot of offroad, it should last. I painted mine and they get scratched from sticks and rocks from riding offroad.
Let us know what you decide.