Decent paintshop near Bromley

[rlw]

Can anyone recommend a paintshop in or around Bromley. The wife's C-class has developed a fair bit of rust in the arches (it is nearly 14 years old mind) and I want to get an idea of the cost of dealing with it as the car is still quite low mileage - 75K - and is running very sweetly. I reckon it has a couple of years in it at least, so it would be nice if it didn't dissolve into a rusty mess for a while.

Thanks