Husky, Gedore, NASA, Heyco/BMW, Plomb, S-K, Diamond Calk Horseshoe Co. (Before & After Cleaning)

After cleaning.  Not a dramatic difference in the picture...

This is a very small wrench.  Just a few inches long.  Could even go on a key chain...

This doesn't need cleaning...

Mid-cleaning.  The left side has been cleaned...  This very large wrench is made of brass.  My understanding is that if you have a heavy hit with this wrench, it won't make a spark...