I would like to clean up a rec. in the white.
Should I buff it or polish it with some flitz?
It is in fair cond.now I would like it to look like new. Thanks, Daveo

Flitz on a cloth won't hurt, but definitely don't buff it on a wheel.

Polishing with stones and paper will make it look new and keep the edges sharp. This is all done by hand though and will not be inexpensive.