If your wheel centre's are OK.. just have your outer rims done! to polish properly they have to come apart anyway, paint stripper the lacquer off, and carefully sand out any corrosion, using increasingly finer grades of wet/dry, then finish with autosolve... its all about elbow grease! thats if your keen

Or, get them split down, and take the rims to a local metal polisher (generally, people that do electro plating) you could save yourself a fortune! thats if you want a chrome look! if you want diamond cut, then you really have to go down the specialist route. expect to pay £40-60 +vat per rim, anything less is a bonus! These are just a couple of options available,
Tom