[dsraven]

I would suggest that, if you have a compressor and the will power, get ahold of a touch up gun or spray gun and mix your own. the pot life of the mixed product is because it is a 2 part epoxy. like mixing fiberglass or body filler or an epoxy glue. it is a chemical reaction that is somehow slowed down so they can keep it for 4 days. this stuff is usually hard in hours. the mix it yourself routine would possibly be a better end product to apply your filler or paint over. not saying the spray can isn't any good, just saying the home mix is probably better plus you can mix small quantities as required.
I know some will say you need a bunch more stuff to spray at home, filters, water seperators, pressure regulators, masks, etc etc. but if you are rebuilding a truck then it is good to have anyway. you can use it for the other primers as well and it will give you a better rebuild in the end.