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Okay, I have polyurethane expanding foam in spray-cans (Dow's "great stuff" was on bigtime sale at Denault's Tru-Value hardware). I understand from this thread that this foam can take polyester fiberglass resin without disolving. A question: can the polyurethane foam be combined with styrofoam? I am considering using left over styrofoam blocks as filler inside a bumper insert. To reuse materials and to save on spray foam. So, the core would be styrofoam, surrounded with polyurethane foam, finished with polyster resin fiberglass. Can that work for a front bumper cover attachment?
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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