I've got a set of used grooved discs in my garage from my 250. They have a lip on them (2mm at best) but according to the wear markers they look like they have plenty of life left in them yet. I changed them for new OEM last summer as a matter of caution (my car was 5 yrs old and these are the original discs still). Is it worth having them skimmed? What's the likely cost to have em done.
