@goose + @yowser + @grislybutter ...Wax paper still has wax, which may still interfere with oil finishes without a sealer...plastic sheeting may work, but it and foam are still petrol based, so 🤷♂️ one rolls their own dice on this...
I’ve been used 1/2" EVA foam which seems to work for MHO; inexpensive to use in a sheet, or stacked as pucks...
Re ’pucking around’.....spray adhere suitable layers for size, Then cut the pucks out...avoid adhesive on the edges....(generally sold by the yard at roll widths).
The Volara foam 'sounds' interesting, but the thickness available not so much for now....