I've been using an old Sears 7 inch automobile buffer for years to do my
annual topside waxing, but I've noticed others in the yard have a heavy
duty buffer that works a lot better. However, I haven't seen anything
in the stores that's sold as a buffer. Does anyone have any advice on
what I might get? Since I'll only use it a few times a year it doesn't
have to be super high quality.

Also, I've heard its easy to get too aggressive with these buffers; any
advice?