So, unfortunately took me a while to realize it, but it seems the e-brake on my left rear caliper has gotten very stiff and has been wearing down my pads. I took a look and sure enough, it's very tough to retract the parking brake arm on the caliper. I was able to get it moving slightly using brake cleaner and forcing it back and forth a bit, but by using an infrared heat gun I can see that's not really working(that rotor is always about 100 degrees F hotter than all the others when I stop the car), if I avoid the e-brake all together. Today I forgot and parked it using the e-brake and that rotor was 450 degrees F when I got to work! My understanding is it would be tough to fix this on my own and I'm better off replacing the caliper? Assuming that's true(if it's not please advise), I've been looking at different choices on RockAuto. Seems they have new(aftermarket), remanufactured and coated vs. non-coated. ACDelco for example makes a new one that is not coated - I take that to mean it's made of aluminum. That's the cheapest option. They also have remanufactured ones that are about double cost with the core charge. Is ACDelco decent? Better to do reman or new? I'm kinda nervous about the aluminum because I believe the originals are cast iron coated. Thanks for the help!