Having just repaired a crack in my wheel arch after my off at Castle Combe I need to touch up the area. I have some 2 pack paint left from the original paint job which I use without the hardner (so no isocynates) for touching up paint chips which does set after a few hours.
If I use a pencil airbrush to spray the paint over a 4 inch area without the hardner will it set?

Dave

If you dont use the hardener it shouldnt set at all!

it does set up ok.When you dispense the paint from the pot the dribbles have no hardener,hard as bulletts

Ive used it with a pencil brush to touch up chips etc and it hardens of after about an hour and is completly dry after 24 hrs. I was just wondering if it would go off if sprayed over a slightly larger area.

Dave

Dave, it will go off but may take several days on a larger area, can be difficult to keep undamaged during that length of time & it might still "fingerprint" for a month or more. Why not just pop a little hardener in with it, if you use a mask in a well ventilated area you're not going to do yourself any damage - it's about as dangerous as smoking one cigarette I would think, but a lot less addictive!