Hey Simon.
Afraid I can't give a huge amount of info on your querie but noticed your from south wales region. Theres a guy based in Swansea which does top quality work with all sort of wheel refurbishments and polishing; and I mean seriously good, and he should be able to
help you with any information and a price.
His names Steve and his business is called Alloy Polishing Services (A.P.S). If you require a contact number let me know and I can PM you the details.