Oh BTW
Porter's bolt cutters are generally pretty easy to find. They sold about a 12 zillion of them over about 50 years.
The only thing that makes this project possibly worthwhile is that, as far as I know,
10" were the smallest ever made and they didn't sell many of them.
That means scarce.
So I would definitely clean them up, at least far enough to determine if they can be saved at all.
yours Scott