More progress on the garage. Prepped the concrete tonight with a HD floor polisher and a concrete prep pad. Garage is about 485 sq. ft. and took me about 3.5 hours to prep with this setup. (Floor was painted) $150.00 rental fee (24hr rental). the pad wasn't the most aggressive option that HD offered and it created a fairly smooth surface - I would have preferred a rougher surface. nonetheless, its done. I'll acid wash it tomorrow. Let it dry for a week and then put the epoxy down next weekend. Temps and humidity will be perfect (must be between 60-90F and less than 85%).