DxC

so just around the time i was learning about galvanic corrosion in my manufacturing processes class, my stoptech rotor hats cracked badly and would rub against the back of the pad. i sprung for the zinc plated ones this time although i believe the issue of corrosion was with the hat not the rotor. the aluminum hat just has an anodized black coating to keep it from mating directly with cast iron. sucks to be in the NE i guess.

one thing led to the next, and im completely rebuilding my brake system and powdercoating my calipers since the paint chipped off of them. the calipers used to be g2 painted, and it seems there is some hardener in it that makes it a pain to remove. ive been hitting it with sandblasting, and with paint thinner but its very stubborn.

is there another better way or some secret jive i can sling to find out. ive decided to powdercoat them in nogaro blue(ish). trying to decide on what to put where it used to say "APR Tuned". any ideas?

jwolf::ASP S3

try a sand blaster with a more aggressive media. and i would put rings or the s logo on them

OCA::DIY Motorsports

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StopTech CustSrvc

I would concentrate on getting a smooth surface with the paint still in place, especially in that it is so aggressively adhering to the caliper already. Hit it with some sand paper and smooth out the chips would be my advice. You can even use a more aggresive sandpaper to blend in the surfaces.

If sand blasting is not taking the paint, I'm concerned with what else it may be doing to the rest of the caliper. If you have dis-assembled the caliper, I hope you masked off any openings to keep media out of the fluid passages.

You might consult the shop doing the powder coating to see if they concur. The G2 is pretty robust and if you rough up the surface, the powder coating should adhere.

If the calipers are still assembled, mask off any threads, the pistons, the contact points of the bridge and where the bridge touches inside the caliper and the plates that position the pads. If you mask off the ends of the bleed screws, theo other hardware could likely be coated.

Hope this helps, feel free to contact me directly if you want more advice.

Matt Weiss

mweiss@stoptech.com