[JohnH]

if they are actually glazed, but have lots of material left, don't replace em. Just take the apart, place some coarse sand paper on a flat surface and carefully and evenly rub the pads over the paper. do it in 5 strokes at a time and look at the pad. keep it even and go until all the shiny area is just gone. lightly chamfer the edges, slap the pads material side togeather a few times to knock out the dust, clean the tips where they slide in the brackets, and reassemble them.