I think powder coating is OK, talk to your powder coater and see if they're comfortable with the job.
If it's not well attached it'll chip easily while assembling and most likely when disassembling.
If it's to thick may cause problems assembling,
Same goes for paint in both cases.

To ease assembly cut strips from a plastic antifreeze or oil jug and use them to pad your pry bars and between rim and rings. they're tough and slippery, helps things get together without chipping.
Also good for padding tire iron when fitting tubeless tires on nicely painted or powder coated rims.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-