oh right. Yep it's veneer, type often used on hollowcore doors. My shop neighbor is a cabinet maker and was able to cut them down perfectly from 4x8 sheets so we could successfully register a 5 color run. Then we made a "stain" from some based and watered down flatstock ink (ours are wb) and went to town.
Poster is a commemorative for our retail store which we closed recently as part of an acquisition. The store was an all-ages music venue by night and we threw one last blowout show last Sat.