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I've formed it with a heat gun. Of course simple 2-D curves are a snap; compound curves can be done as well. It is very easy to overdo it with the heat and cause unwanted melting. The ribbed internal structure of coroplast collapses if too severe angles are attempted- that might be no problem though. The concave side of curves collapses/wrinkles as well, so if you are concerned about the aesthetics of the part try to only have the conves surfaces visible as the concave ones will look shriveled.
Overall it is a very easy material to form and work with but the ribbing causes some aesthetic limitations.
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