I am still amazed how many people don't now you can buff plastic back easily. Heck you can even use shoe polish if you insist on a polish.
I have always had great results using carnuba based "cleaner wax". The micro abrasives in it clean plastic up nicely. I use it on tails, reflectors etc. Rub it now real good, let the wax Completely dry, then buff with a clean soft towel. In most cases the plastic looks brand new when done.
I'd think using a bench grinder with a buffing wheel on one side and polishing wheel on other might be easier. Then you can use both hands to better control the light as you work it along the wheel and could better control the pressure you are applying. Just a thought. This message courtesy of crapatalk!