I used acrylic enamel with an activator for many years, and my comments on it pretty much mirror Pat's.

Clear coat systems seem to have a hard life out here in AZ due to the extreme heat/harsh sun and I prefer to use a single stage paint that can be buffed out when it starts to fade.

Maybe it is just me or possibly the formulation on the enamals I was using has changed a little, but the last couple of enamal jobs I did didn't seem to go on quite as smoothly as they have in the past.

I have switched over to single stage urethanes. They are supposedly a little more durable than enamals (I'll let you know in 5-10 years ).

I've shot Nason and Chroma 1 so far and really liked the way they went on. Price seems to be reasonably comparable with enamals.