What the actual fuck? Is that some homemade grow house or what? Years ago I installed cable and that is exponentially worse than anything I saw.
I shit ewe naught. Last week had a guy come in with a pair of rotors, and a receipt from 2006. Wanted them warranty replaced. Oh, and he needed a caliper and brake pads, too. There was approximately .006” more material over the vanes than in your picture. Didn’t like my answer that those rotors weren’t going to be warranty replaced.
Mechanic my ass! I’m a part time parts pusher, I get paid to sell you shit, not give it away because you think grinding your brake pad backing plates through the rotor is a defect in material and workmanship! And .006” might have been generous. While demonstrating to me how defective the 15 year old brake rotor was, he broke off one of those bits between two vanes.