100 bucks a wheel seems pretty damn steep!
Bead blasting is normal...gets rid of the dirts, oils, etc...some places will do a chemical wash, depends on condition of the metal.
4-5 days turn is acceptable if its a busy shop. Same day if a slow shop.
You can have them do a clear coat over the color for durability, but I don't think its really necessary.
I would shop around...there's usually alot of powder coaters around.
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