I suppose I never completely polish my old bars. And inevitably there is a little residual glue on them, so I never really know what is under it

The older bars are pretty thick.

That is quite a bit of pitting. but I've seen photos of worse.

Any idea of the alloy? 6061 is supposed to be fairly corrosion resistant, while 7xxx series aluminum is supposed to be stronger, but less corrosion resistant.

It is hard to say whether I would use them or not.

It is probably another of those parts that would get reserved for personal use, but I would not sell as part of a bicycle.