Post by
mdmellott »
https://forums.nicoclub.com/mdmellott-u292054.html
Fri Feb 24, 2023 8:37 am
Used rotors, even in good condition, will often have a polished, glazed surface created by the old pads and the old pads will often leave a very small, sometimes sharp, lip protruding at the outer surface edges of the rotor where the old pads do not make contact with the rotor. I always dress old rotors to remove the glazed finish and if there is a lip, I will carefully remove that with a fine file. For rotors in very good condition, I usually use a fine grit emery cloth sand paper and oil to removed the glazed finish. For rotors that are not so perfectly flat but still in fair condition, like the last time I replaced my pads 6mo ago, I use the fine grit side of a small sharpening stone to flatten out the high spots and remove the glaze at the same time. The stone will also remove and flatten out the outer lip as well but you may still need to hit it with a file first if the lip is too big. Since you have slotted and drilled rotors, I recommend using a block to keep sand paper flat onto the surface of the rotor as you dress it up, otherwise you may round off the edges of the slots and holes if you just hold the sand paper in hand causing your finger tips to press into those edges. The fine grit side of a sharpening stone will work well for this also. The size of the stone I bought was only 3" x 1.5" so it was easy to dress the rotors' entire surface areas very quickly.
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