Spotting On Zincoln's

In the course of cent roll searching I'm often finding spotting on circulated Lincolns 2008 and older. The spotting is starting to get more common on the 2009's and an occasional 2010 as well. Even when I find what at first appears to be a gem quality coin I quickly notice a few spots on the obverse and a little less on the obverse. It's quite rare to find a visually appealing almost perfect Lincoln. I do seem have better luck in the 94-97 range. It's a shame to see some of these newer ones getting messed up so quickly.

The spotting looks like little circular spots where tiny drops of muddy water dried, but they don't rub off. That's the best why I can describe them without a pic. I'm sure you've all seen them. I'm guessing that it's the very initial stage of corrosion starting on the coin.

-I know cleaning is bad, but in these scenario would acetone or verdigone or something remove these spots and then allow the coin to be properly preserved? I'm not positive it's verdigris though, it's not green.

-If I do have gem quality 2009 and 2010's in rolls and tubes in a dry environment will they eventually naturally start spotting like the other zinc's or is the spotting more caused from being circulated? I wasn't sure if this spotting is an due to environmental or a person person [or both].

...meanwhile I can pick out some 1960's cents in better condition than the 2008's. Gotta love zincolns.