My rear rim has some nicks on it and needs sanded / buffed, but I'm not exactly sure how to go about this? I would like to do something unique with the 78 SS rims and would appreciate any ideas. I thought about buffing the rims and painting the rest black, but I'm not certain? Don't have a visual just yet.
What is the widest tire size I can get for this bike

I currently have 120/90-18, could I go to a 130 or 140?
I'm currently in the process of taking the rear rim off the tire and preparing the rims for sanding. I can't get the center axle out of the rim, shouldn't this just push through?
I've not had this problem before and I wouldn't want to mess up any internal bearings or anything like that? Well, I believe this is all I have for now? Does anyone on this board live near Ft. Wayne Indiana? Just curious.. Thanks all...