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The main issue you have to watch is whether the rotors are pitted or not. If the surface is smooth just driving and braking a little will clean them up typically. If the rotors are pitted then you'll likely have to resurface or replace the rotors.
Just noticed rough surface rust on rear rotors any way to scuff them up? I just hit 16000 miles on them ,original to car!
I have used a small 4 inch electric angle grinder with a rust removing disc; works good but keep your fingers away and use eye protection! Something like this: the brand name is not important. You can get cheap ones on Ebay; they don't last very long. Flap sanding discs work well too.
Go out and drive it. After you hit the brakes a few times the surface rust will be gone.
Okay I pulled the wheel today. I pulled the pads and the caliper off. The caliper is not seized. I tested it to make sure the Piston was moving in and out. So the Piston is not seized. The pads are correct but the outer pad had rust on it. It's clear that this particular pad is not coming in contact with the rotor. And I can't figure out why. I pulled out the caliper pins and they are greased properly and moving back and forward. What could this possibly be? Do I need to buy new rotors or something? I made sure to tighten down the bolts really well and I re torque the wheels to 100 foot pounds.
Okay I pulled the wheel today. I pulled the pads and the caliper off. The caliper is not seized. I tested it to make sure the Piston was moving in and out. So the Piston is not seized. The pads are correct but the outer pad had rust on it. It's clear that this particular pad is not coming in contact with the rotor. And I can't figure out why. I pulled out the caliper pins and they are greased properly and moving back and forward. What could this possibly be? Do I need to buy new rotors or something? I made sure to tighten down the bolts really well and I re torque the wheels to 100 foot pounds.
Either some part of the caliper or bracket is seized or corroded or your not getting full pressure to the caliper's piston. Try bleeding the brakes all the way around. The areas where the pad contacts the caliper and bracket can get corroded and pitted not allowing proper movement. Inspect that, lubricate as necessary, and make sure those contact points are smooth and move freely.