I've sprayed my share of John Deere implement paint and I fully agree with Old GMC. Use the hardener and with a good prep job it will shine as well as anything else. It is a synthetic enamel and is 1950's paint technology and might not stand up to long term outdoor use as well as a urethane would. I'm not sure I agree with the statement of implement paint being tougher. It's usually the first to start oxidizing.
