Coroplast is a common "board" used in the sign business - especially outdoor advertising. It is available in varying thicknesses and I think the thickness of the underbelly is greater than you would find in most signs and posters. I also note that the Coroplast website gives a breakdown of the various dimensions and thicknesses. The larger thicknesses have a heavier skin on the outer layer which might provide better protection and stand up longer than a thinner one.
What about checking building supply places (Home Depot, etc.) as well as outfits tht make and sell signs? They might sell you a sheet but I think most of the sign places would not carry black.
__________________
2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
|