This Lincoln cent is pretty good wear-wise, but probably would a details - environmental damage slab. http://www.cnn.com/2012/08/14/tech/gallery/mars-curiosity-rover/index.html?hpt=hp_t3
Have it slabbed along with the Mars dust & without any conservation. Of course, the slab should list the "Mars Rover" provenance.
Rats! All that dirt. Send it in for cleaning! A nice jeweler's cloth should clean it up nicely. Yup, nice and shinny.
I hate to say it, but with that much crust you'd probably have to take some steal wool to it.......then a few hits with a hammer to smooth out the hairlines caused by the steel wool.