Powder coating will give you back what you give it, in any color you powder coat. IE: any imperfection's show up, corrosion spots, divots, holes, etc.
If there is not much clearance for the hinges, when you re assemble, yes, the powder coating can chip/wear and that will bring you right back to where corrosion starts.
Anodizing gives you back exactly what you give it, imperfections, corrosion holes, welds, discoloration, etc. It is very hard to anodize an original piece and have it come back to original.
Painting I find gives me what I want, protection and repair ability, any of the processes take a tremendous amount of prep and protection.
IE: Soda/sand blasting, acid washing, sanding, priming, sanding, partial assembly, prime, sand, paint, final assembly. (if Painting)
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