Hardy way to colour crank arms

[muddytreker]

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

 

[dyna-ti]

Sticky backed plastic

 

[muddytreker]

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