Ducman82

my rear rotors have just about 2k on them... and I'm wondering while I'm doing my trans work, if i can get them yellow zinc plated and then just wear the coating off...... i hate rust..

Rob Edwards

I had a set of rotors done in bright zinc, and theyr'e still blingy looking, but when they were bedding in there was clearly material transfer onto the pads, and during that time braking performance was definitely affected. I think I'd just take your rotors, tape 'em off, and hit them with gray VHT paint.

Plated:



Taped:




Painted:

Dave928S

Be careful of layers of paint on hat inner and outer faces. After you fit the wheel on a recently painted setup you can have the paint soften and act as a lubricant, and cause issues with rotational slop if you don't re-torque soon after the first few heat cycles. The problem is worse where you have two painted smooth surfaces together, and less of a problem where you have annular machining marks on the inner wheel face, because it will push through the paint layer to the hat.

smiffypr

Keep them hot and they won't rust.

Speedtoys

Not sure what that means.

I beat the **** outta mine on mountain roads every day..and theyre rusty.

Oh ya...theyre not hot day & night.

smiffypr

Get them "blued" and they won't rust. Try harder. Maybe visit a race track.

Yours must be getting damp in order to rust, I thought California was dry as a bone.

smiffypr

This is what disks look like when they have been used properly.

dr bob

I used some CRC "instant cold galvanizing" spray on the rotor areas that weren't already galvanized. mainly the finned areas and insiode of the hats. Masked the friction faces as Rob shows. Once dry, I painted the outside exposed area of the hats with wheel silver, then a few layers of clear. I know the zinc spray will be fine. Worried more about whether the hi-temp clear will hold up without yellowing or scorching from the heat. Won't know for a while since I so seldom use the brakes.

mark kibort

they are not getting hot enough!



2 full seasons on some already used GTS rotors, and a few major rain races too!

no rust!

dr bob

Mark--

The discoloration is a telltale ign of hard spots that make resurfacing really tough. While they might have been turnable on a standard brake disk lathe, they are now doomed to a life of grinding for any refurb. No wonder you are trying to get $13 rotors to fit!

The one on the left looks like it was just blasted and needs an initial protective coating.