Yeah, the hole in the back of Spike's head was a significant flaw in the toy, and the lack of eyes was just CREEPY. So I fixed one of mine (I ordered a couple to spread out the shipping cost).
I'm in the process of doing that and also painting all the all the areas that "should" be white, white. I've got too order some more white paint though first.
I did another for a friend (looks the same, no new pics), and then once Spike hit actual store shelves he grabbed a few more and asked me to chrome the helmets as troopbuilders. Took a few tries to get a satisfying mix of shine and durability.