Hardy way to colour crank arms

Re:

Cerakote, Gun coat, there maybe other firearms coatings similar.
I've had a couple rifles & a blade
done in Cerakote, hardy stuff.
Oven enamel paint maybe
 
Re:

Sticky back plastics can work fine
with flat & slow curved surfaces,
but deep grooved shapes that are on
CNC'd cranks, then It gets a bit hitand miss.

A 2k lacquer may help in addition
to any colour coating.

Generaly easier to go with a raw
alluminium on wear areas, but some
prefer to keep a pristine colour
 
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