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Do these cans look normal inside?


 

These cans have a ticket they left Sinclair in 2015. Supposedly new old stock.
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Do they look normal inside for the age? Looks like condensation was a thing inside there at some point for the spottiness.
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The dark & black streaks are what has me wondering. I see some on the side walls. Also the end of the plunger tube looks black..could be solder flux??
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I was half tempted to take them apart to inspect more but I'm in no hurry. So I thought I'd ask the pros.?
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I uploaded them to a folder on my qsl page. So they can be viewed in better resolution. Labeled them accordingly.
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https://qsl.net/n/n4fox//cans/


 

The link didn't automatically set.. I'll try again
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What behavior are the cans exhibiting?


 

They are fine. That¡¯s just some leftover residue from washing off the chemical treatment of the aluminum.?