Epoxy coat will eventually peel and lift. Don't bother when any OTC stuff. If you insist on Epoxy coat, but the best product you can afford and be prepared for a lot of prep work. The walk behind grinders will best prepare the surface, but that is big $$$ to rent or pay for someone to do it.
If I were to do it again, I would use a tile setup. The epoxy will peel in certain areas where it didn't bond well because of surface imperfection, sticky race tires causing tire peel, etc. I spent three days prepping and bought some serious high grade epoxy, so it is not peeling because of workmanship.
There was a thread like this a while ago.... Wingboy has a nice setup, do a search he posted some pics.
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