Well been using it on the roadster and so far this is my findings:
One: Don't EVER get it on skin, it will not come off.. I've even poured paint stripper on my hands to try to get it off.
Two: Thinner the coats the better, if you get it too thick it will bubble like no tomorrow and you'll have to cut them off with a hobby knife.
Three: Even in a open environment you might take a break every 10 minutes.. I was stumbling around after an hours painting session and it wasn't the brown party liquor either.
Thats all I can think of so far, but on the good side I can tell you it fills in the pinhole sized holes in my body and sticks quite well to old my old rusty ratsun.
While painting I even came up with a name for my roadster, I proclaimed it the rustster. (pronounced ruster lol.. I blame paint fumes)