I figure any mag wheel repair shop can do it, clean them up, carry out any repairs, coat of paint, machine faces, clear if needed. Just be aware that it will likely cost more than many pay for replacement wheels, a set in poor condition can cost similar to a set in excellent condition to restore so sometimes hard to justify.
Especially with the introduction of the larger diameters, plenty of nice original wheel went on the market for good prices not seen previously. Having said that, I like the multi-angled face on the 15x7 flakes, a wider version that maintained that plus a lip would have been neat, especially now in larger diameter.
There's plenty of info on here too about wheel restos and colours. You want Code 55 Gold for the rims, of course matching that now is another challenge, but at least start with the right code!