>>514693801 (OP)
Plywood is better than solid wood at that thickness. It doesn't have a grain, so it doesn't split. And, depending on the resin used, can be 100% water proof and won't warp.
>>514693922
cardboard sounds worse than plywood
if pressed op will default to something like >whatever it's basically the same thing
he think we're not wise to basic linguistic trickery
