When should rusted body parts get the heave ho?

It's a different story when parts are being reproduced, but unless I'm mistaken neither of those items are re-popped. I'd be looking for cleaner stuff if that's what I had, but I bet there's folks out there that would be happy to have that instead of what they've got.
Well said. Unless i was to see it in person. Both my barracuda trunk lids are rough. I need to de-skin them and deal with rust from inside out.