The H series
coatings (oven cured) are incredibly hard. They are thermally cured, so depending on exactly what was used to bond your mod may not be suitable.
The C series
don't require thermal curing, and aren't as indestructable as the H-series, but still much tougher than any paint/anodizing/powdercoat.
Normal prep requires immersion in a degreaser, so once again the adhesive used may be an issue. It might be best to disassemble, get it H-series coated and rebond it.