Imron is awesome paint. I've used it for over 30 years and haven't had a problem yet. Personally I find it easier to spray than enamel but your results may vary. If you do decide on Imron, have 911 on speed dial or a defibrillator handy when they tell you the cost. You have been warned.
Surprisingly Imron has remained somewhat reasonable in cost, but your local paint supplier will mark up accordingly, but depending on color it can currently range from approx $150 to $450 a gallon (jobber price).... first time I used Imron was about 40 years ago when it was new on the paint scene.... a gallon was $70 and the hardener was $30 (full retail price) that was almost a weeks pay back then..LOL!
