What do put on bare metal and till drive my car??????????

Yep a good Epoxy sealer will work best. I would do about 3 coats to ensure good coverage. I just did this for a buddies shell that he is putting in storage for a while. Summit sells a cheap epoxy and catalyst. I shoot it with a 1.8 tip http://www.summitracing.com/parts/SUM-UP230/
http://www.summitracing.com/parts/SUM-UP231/