I know I spent years with the false belief that since polyester resin melted EPS foam, epoxy resin melted polyurethane foam. I don’t remember who set me straight (Greg Loehr?), but it was someone on this site. I see that the same misconception has been posted recently on another site.
Hardly a day goes by that I don’t pick up something here but that epoxy resin thing was a real eye opener for me. Thanks to whoever it was!