I never machine or de-glaze. I deliberately run softer pads, on the premise that I’d sooner replace pads more often, and rotors less often. I figure warpage/runout would be noticeable/objectionable before there was a safety issue…so pad slap and replace rotors if and only if pulsing noticed. About all I do is an acetone wipe to get my greasy fingerprints off before my shakedown run. Also, I don’t have my rotors cut…when I price it out, parts store rotors are only marginally more expensive, and much less work.
Just for kicks-n-grins, I measured thickness, and I have about 0.035" excess on both rotors…
Just to reiterate, in my experience, you'll get 20-30% better braking performance by replacing the rotors, even if they are not warped or damagedCould you clarify? I have sufficient stopping power to lock wheels on dry pavement--so I don't understand a 20-30% stopping improvement, when the tire friction is the limiting factor.