Found a decent paint for less than a mil ?

I have used the tractor enamels on floors as a sealer, tough, durable, sometimes has hard time curing/drying. probably goes on so thick, is the cause, and spraying it surely would require a thinner. I have had good luck with TCP Global acrylic urethane. like he said, for all the work to prep, use a decent sealer and topcoat, is my thoughts.
not sure what the tractor restor guys use, probably high dollar base/clear!???? LOL