Sourcing suitable materials for signmaking / woodworking / engraving etc. is often a major
problem for users. So if you have know where to purchase Wood, Plastic, Foam, Corian, HDU
etc. please add the web site details in this thread,
2 very good suppliers of High Density Foam / HDP / HDU are,
Both companies will supply samples for you to run test cuts.
Precision board have a coating for foam (HDU or Polystyrene) called "FSC-88-WB" (the WB is
for water based as it does NOT eat away the polystyrene or HDU).
Hope this might be useful.