Good thought on the compressor noise thing. I have enough leftover building materials to fabricate something as you describe. Only thing I have to decide is do I want to put in the effort for the level of inconvenience, and will it look nice enough when done.If you made a U shaped enclosure around the air compressor and lined it with sound dampening panels, the compressor would be a lot more acceptable.
Sorry hearing about your experience with epoxy floor paint. There are lots of brands out there. The best will literally last 20 years being subjected to acids, etc. They will not show wear or lift due to hot tires.
Agrre with the epoxy paint statements. I have seen some really nice professional level really expensive coatings. If at some point I think the floor looks sufficiently bad to redo it I'll definately upgrade. I think the ones that have flecks probably do a better kob of hidings stains also.