This does suck every set has a haze on them. I am not able to remove it with Acetone, this is after a 5 minute soak.
No idea except for the cent. This is caused by improper storage. I've seen a ton of sets ruined like this. I've only had good success with cents. Typically, it's simply a light verdigris haze that's easily removed with VC. Here's a customer picture for before/after - mint set pull:
Like I said, I've never had good luck with clads. Most of them are cheap enough that it's not worth the trouble. I gave away a bunch of them to kids. They didn't seem to mind.
I have a lincoln tapeworm toner ill post up tomorrow. It would look cool with yours if you slabbed some.
How Ya doing smo! I have been working my Back side! Full exterior! in Golden, CO. Thanks for the like, Sometimes when I look at it? it looks like an S/S/S.