When I changed engines on my non-RV, I powder-coated the baffles. It took 600 hours but there is now some paint delamination.
At least bad and more annoying, is that the white powder coat sucks up dirt amazingly. It's almost as aggressive at getting dirty as Fiberfrax.
On my RV-3B, I absolutely will NOT do that again!
That leaves open the question of what will I do for the baffles. I'm thinking of leaving them bare, but haven't decided. Ain't gonna powder coat them, though, that's for sure.