It's hard to guess as it depends how bad yours is, mine was just bubbling on the lips and I think I was quoted around £450 initially but he asked me to come back and look at what he'd found after stripping the skirts off and it added another £50 to the bill to do the extra bits.

I also had all 4 wheels refinished at the same time which included filling in some pretty severe kerb damage on both nearside wheels (2 previous lady owners!!) so my total bill was over £700.

The best thing would be to drive it in to a couple of places and get quotes.