I was doing some reading and a bunch of guys had some real problems getting the nuts off. A set of nuts was priced at $50 or $60. Hell I'd give it a try and see if you can get them out and sand/ paint them. Especially if they had them out to spray, you might just get lucky.
Probably just "jam" nuts and grade 8 bolts.
To help cut through the rust and get the nuts off easier, mix a
50/50 batch of ATF and acetone and squirt that on the nuts. Works better than 99% of the stuff on the market at freeing up rusted parts. Just remember, the acetone is very flammable.