Customer somehow rusted the inside of this Makita drywall saw solid, but can it be saved?

How to dismantle and repair a broken Makita DSD180 18v drywall saw. Customer dropped this makita saw in for repair, but what the hell was he doing with it. It was rusted solid inside. Stip it, clean it, and see if we can fix it. #dsd180 #drywall #saw #rusted #jammedup #customersays #tools #repair #powertools #diy #workshop #makita #toolrepair #deandohertygreaser #deandoherty #powertool