When I had my mk6 GTD, I got Chips Away for a quote to repair some minor damage on the leading edge of the front bumper at the bottom. They said they could paint it, but you'd still see the damage, which was no good to me; I wanted it perfect.
I went to a local firm in Norwich who undertake smart repairs, including plastic welding, which was required as part of the repair. They did an excellent job, the paint was a perfect colour match, and they charged less than Chips Away were going to charge for a half hearted attempt at a repair.