The obverse looks like a whizzing job gone really bad(not that there is such a thing as a "good" whizzing

). The 2nd photo in the second set of images shows the striations left by a high speed rotary wire wheel, they are much stronger than hairlines left by a typical cleaning. Unfortunately, the white balance setting makes it very difficult to see what is going on with the lumps on the reverse.
My best guess would be that the coin was soldered to something(belt buckle?) and someone tried to remove the remaining solder with a Dremel or wire wheel attachment on a drill and then just carried the work over to the obverse as well. Since there are no lumps on the obverse, it received a less vigorous abrading than the reverse.