So I’m trying to sand off about 3 coats of old Sikkens stain from my redwood deck and it’s taking forever with a belt sander. I’m now looking into orbital floor sander options. Given my complete lack of experience with these things, should I rent one of these babies and give it a try or forget about it and pound the pavement and look for a professional. (And do I start with companies that do interior hardwood refinishing?)