Just let your powder coater do the prep. Any good shop will automatically include all prepwork in their quote and wont likely discount much if you insist on doing it yourself. Besides, you want them to be responsible for the outcome of their work don't you?
I just had a bunch of parts done last month while I'm still down for the winter. It was fast, cheep and everything looks incredible. ...And now riding weather is right around the corner.
Anyways, to actually try to answer your question, I think they are powder coated from the factory.
