i bought myself a set of these Zipp Carbon/Carbon brake blocks because i had read many good things about them. i read about the higher melting temperature, the fact that they don't rub off onto the rim, they instead turn to powder over their wear, that they don't have any abrasive materials in them to ensure less rim wear, and that they have a much better stopping power than the cork pads used for carbon rims.

so i'd heard more than one suggestion, here and elsewhere, that using a carbon pad on a non-machined powder-coated rim would work fine, so i thought if i was going to go with it, these would work even better. i strap them in, take off down the street, and hit the brake. what do i get? black **** scraped all over my rims. now before i go and try to get rid of them is there anyone who's tried these on powdercoating with any success? and before i spend any money on some cork pads, does anyone actually have any EXPERIENCE with successfully using them (without wearing down the coating), not just hearsay. thanks