I'm with fredster. I found that, after replacing my solid rust trailer brakes after just 4 years as well, I had to go in there and clean them up good and spray them with a good sticky/tacky lubricant spray wherever I could, trying to be careful not to get it on the pads or drum. But even then, I'd rather have to burn some off in the fall than to have them be shot and replaced in a few years. Gives you a chance to make sure the springs are ok and still connected, and everything is still moving like it's supposed to as well.