Hello all, I am rebuilding some superstructure components of a ship built by a local member that unfortunately passed away & I am not sure where to find the material he used for the superstructure of his ship. It is a closed cell stiff "foam" that I believe is used for exterior trim around windows... but I'm having a heck of a time tracking it down except for something at home depot which is not in stores to inspect. Any suggestions as to where I can locate some online (or locally SoCal) would be appreciated. Thank you, Harry image included is of the material used in the boat. it is very firm & lightweight. Easy to sand smooth.