Quote:
Originally Posted by mpg_numbers_guy
Rustoleum spray paint on Home Depot white coroplast holds up well. I've used it for several months on my Civic and the paint has held up fine to dirt roads and all kinds of weather.
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I'd lean towards some sort of vinyl self-adhesive film covering.
Just get it in the color you want, much easier.
Black goes with everything.
EDIT:
You can epoxy resin coat/paint rigid insulation (extruded polystyrene), be it inches thick or even thin Fan-Fold insulation. No need to use fiberglass cloth if you get the mix right and if you like taking risks or experimenting. It may crack on you, then you have zero strength, just like that - no shell.
Downside, that much epoxy resin/hardener and graphite power additive to make it glossy black is not cheap.