2-part clears give wonderful results, but the fellas are correct, you need the correct equipment for your safety. Isocyanates are attracted to moisture (moisture helps them to cure). Problem is, most people think a simple mask will do the job, but it doesn't. The iso's will get into YOU through your skin and eyes. That's why a supplied air system, and the dopey-looking 'bunny-suit' are a necessity. Otherwise, you'll be breathing clean air through your mask, while your eyes and skin are being bombarded with iso's.

The pro to the catalyzed enamel versus the standard enamel is that the catalyzed enamel finish will be impervious to solvents used in the enamel, whereas the uncatalyzed enamel finish will be susceptible to these same solvents.