Did a quick bath in Hydrogen Peroxide 12% for 6 hours. Replaced the screen, the battery cover, the lens cover. Scrubbed the motherboard with some isopropyl alcohol. Mostly oem except for parts i replaced. I should have taken some before and after pics. Next time.
FYI if anyone is interested in doing this let me know and I will get you the eBay seller I go through for the Gameboys. I buy 5 for $155 with tax and shipping from Japan. Comes out to $31 a unit.