Hey Leon,
I do find cans but it's not too often that they are any good. They're usually pretty far gone. Apparently, the color changes on those Weber ones compared to dry stored ones.
Hemi check this one out. This was one of my favorites. You can still see the hole in the can though.
Someone found out I collect bottles and gave me the labelled beer which was super cool.
I've know a few people who dig out old cans from drained lake bottoms. I've dug a few myself. Sometimes they will come out in real good shape sometimes not so good, depends. The colors usually do change especially the reds like to turn dark maroon. If they are found deep in the mud they get better protection, with no oxygen not much rusting. Some of mine below. LEON.
How cool! They're in great condition too. I occasionally find a clay beer at a dig site, but they're usually banged up or broken at the neck. That bottom silt and mud are far more gentle than old trash dump fill.