Thanks guys. I won't say this is the ONLY place, but I've posted allot of underside pics too and you can see shes pretty clean. It has lived in Cali and Texas its whole life (was made in Cali). The lack of rust was one of the reasons I bought this car. Plus it has only 1 dent in it. The rest is just scuffs in the paint. I will admit that one dent is really bugging me, I might see if a body shop can smooth it out. It is above the driver side rear almost at the top.
I'll go ahead and try sanding it. I'm not too crazy about the blasting idea, plus I'd need to buy a blaster. I already have a wire brush and sand paper. Would Autozone have POR15?