Hey all, I have an S4 but the previous owner upgraded to RS4 (or 5, I can't recall - I think they're the same) brakes, i.e. the ones with the wavy edge. It's come time to change pads and I don't fancy spending £700 on new discs as well so wanted to skim them (never been done before so they should have plenty of material in order to do so), for which I'd go to one of the pro cut lathe centres to have the on-car skimming. Problem is, I'm not sure the lathe would cope with a wavy edge disc. Has anyone had one skimmed before?