John, thanks for the info. It will be awhile before I get through my can of Rock Hard.Are you the one that (in another thread) warned about NOT using polyuerethane (sp?)? I've got a 60s MIJ set that I hadn't gotten to yet, and it has a clear Luan interior... and hadn't thought of that...
That was Jonnistix. He said that using polyeurethane will not allow the shells to breath and give them a plasticcy sound.