Plywood?

[tsubaki]

This is the best plywood I have seen for staying together.
Problem is, the coating on it makes resin almost impossible to stick.
A vigorous sanding will help.
This plywood used to be coated with an oil that had a diesel smell to it, now the coating resembles a wax of some type.


And Stinks right, don't use treated. It's not just the fact nothing will stick to it, the glue will seperate in the layers.
The cabinet grade stuff Skools is referring to is lighter and more rigid (requireing less support), would be the best bet.