Quote:
Originally Posted by California98Civic
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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The styrene will dissolve with polyester resin,but if a blocking coat of carpenters glue,or polyurethane spar varnish it will be non-reactive.
You could glue in your styrofoam to fill in the voids,then just 'paint' the exposed surface with glue.