Metal rubbing sound/Chain cleaner

[Water Warrior 2]

Alantf. Years ago when dirt riding we would often loose rear brake effectiveness and develop some noise. The brake shoes were just dirty and the drum would be somewhat corroded from water crossings. Standing on the brake pedal was often a useless task for any reduction in motion.
Bought new brakes shoes and lightly sanded the drum to fix the problem.

Now, being a cheap bugger and hating to throw out next to new but ineffective brake shoes I tried an experiment. I lightly sand blasted the brake shoe lining. Talk about a magic trick. Absolutely perfect. All the slippery coating was removed from the lining and I always had spare clean brake shoes handy. This might work for the GZ as well. Any glazing on the lining will be removed. Sand the drum with emery cloth and put the bike back together.