Originally Posted by
Pete Staehling
This may or may not be of any use at all, but i do recall a friend making a table top that way a long time ago. He used it to take to arts/crafts festivals and it took lots of abuse, some exposure to the weather, and showed no obvious damage or warpage. His needs for flatness were not all that demanding so I don't know how flat it was or if it warped at all, but there was no obvious warpage, at least not to the extent that I noticed it. I don't know much about exactly which types of ply, glue, or foam he used so this is probably not super useful info. It was very light and quite sturdy though.