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Thanks Geo! Makes perfect sense the way you put it. I will actually wrap them in tape then foil to try to protect the foam from not only the fibre glass seeping in but the heat it might make during curing. They are relatively large pieces and as much pain in the butt they were making,I really don't want to repeat.
As to your question,
I wish I had a large enough block of styrofoam to start with but no these are 2" thick insulation sheets hot glued together and then I used everything from razor knife, saw blade , hot wire (mostly for the inner curve a half loop of heating wire from a hairdryer on 12V DC) sanding block etc. to shape them. Challenge to match the compound curvatures of the rear bumper.Lots of fitting and shaping!
Thanks for the input!
Barna
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