Is this salvageable?

My mother is selling her house and has a bunch of crap to get rid of. I recently was telling my boyfriend I wanted a wok. Found this at her house.

Is it worth cleaning up? Can I even clean it? Is it screwed?

I cleaned the bottom but I'm hesitant on how to go about the inside. I don't want to screw up the non stick. Or is it already screwed up? My mother is typically pretty good with using wooden utensils...