Hi Andy,
I recently had my car's wheels powder-coated at The Wheel Specialist, (15% discount for being a Lexus Owners Club 'gold' member)
They were extremely efficient, (in at 16:00 hrs day 1, collected at 15:00hrs next day).
My wheels had never been kerbed, or damaged, but at 9yrs of age, the inboard paint was peeling off)
The Wheel Specialist made a great job of the coating, a beautifully smooth finish, refitted tyres on the original locations, & rebalanced the wheels.
Cost, after discount, about £380.
I'm very pleased with the result