Did the USS Lexington CV16 have a wood flight deck?

Yes- Lexington's Flight Deck was wood-over-steel throughout her career. After her modernization in the fifties, the Navy began applying non-skid coatings over the wood- but wood (teak IIRC) remained an integral part of the flight deck.

After her decommissioning, those beautiful wood decks were ripped up and replaced with an asphalt-like covering.

It's more weather resistant and cheaper for the museum to maintain- but it's not as pretty.