I did these a while ago, finally looking at forum more today–some cool stuff out there w/ AL and wood veneer. I had some metallic cardstock & tried it & ordered more colors–the etching penetrates to the core, so pending the color you get, gives interesting results. I also included cutting out my “acoustic needle” guitar shape space needle head/neck, as had already done this larger scale from leather to sew onto a strap (years ago did this design as silk screen).
I’ve just ordered veneer “card stock”–it is more like card stock w/ thin veneer layer so can be run thru a printer, so different from the wood veneer card blanks others have tried… (or at least I can cut myself & not pay for someone else to have done that bit!).