Alloy wheel refurb, SE London

I would like to get a couple of alloy wheels refurbed (they are currently fitted to a car, not spares). They are not in terrible shape but have some moderate scuffing round the rim and a bit of corrosion on the inside edges of one or two of the spokes. Age related wear and tear plus some careless parking. They are painted silver all over, no diamond cut bits. Look fine from 10 ft, bit sad close up.

Any recommendations for decent job in SE London/Kent/Surrey (at a pinch) at not-crazy prices?

Also - presume the tyres will have to come off, or can it be done with them still fitted? New tyres just about due and wondering whether to get them done before, after or as part of the refurb process.

Many thks!