Even looks thicker than carbon steel stuff. Looks a lot like a circulon pan with those ridges. Just looks used and missing the Teflon. 

 Could be on to something with aluminum.

Doesn't look cast iron. Looks non-stick, no?

I'd strip and reseason it but i would probably do that anyways. Its fun to me and i prefer to know it was done my way to start with.

As title says, noticed bubbling in wok that I just received. Is it safe to use? Should I strip the factor seasoning off and season myself, or just continue to cook

Was Gifted pre-seasoned wok, went to use it and noticed bubbling around the bottom of the pan