I blocked the car all weekend and primed it tonight. I need to move the car out of the heated garage into a another building. Its cold here in northern Illinois. Will the primer continue to cure if it is cold? It can sit in the garage for a few days before it has to go out. It will be at least 10 days before I can do any more sanding.

Another question. If I put a mustang paint color on my camaro will it burst into flames?

Yes, it will still cure, just slower.

Assuming you used a catalyzed urathane primer, it will cure just fine.

If I put a mustang paint color on my camaro will it burst into flames?

No, but when it's real quiet at night you'll be able to hear it rusting.