I got two smaller plaques, one circular, about 5" across, and the other oblong, to make carrier deck display bases for my 1/72 USN aircraft.  I have PE for the tie-downs, and I used wooden coffee stirring sticks for the deck planks.

I've got a couple of larger oblong plaques stowed away for bases for my USS Pennsylvania and Essex builds.

Great source, those arts-and-craft stores!