well you should be able to handle with it once its dry but just dont put the gun back togther or bare use of it intill some time such as a week
just put it in a safe spot and leave it there for a week so it dosint get scratched or anything
then youl know that the paint is at its strongest and its resistence to chiping and all that good stuff is at its peck
its a good idea to get it back down to the plastic and as smoth as you can because once you shoot more paint over it youl see all your missed spots fairly easy
iv done alot of model painting and such so iv had my bad experiences with the cold and how it likes to crack things up plus bad experiences of airbrushing alot of detail on a model and finding out in the end that i thined the paint to much so the paint could just rub off after its dry like its powder
best of luck
hope it helps
chris