This is a 4x10 foot sign I made a couple years ago- last year we had a nasty hail storm and you see the damage done- the sign was done using Duma HDU [Corafoam], except for the letter 'C' which was another brand I wanted to use up. The sign was built on an aluminum tube backbone and then a sheet of Composite alum/plastic, the white was 1" PVC. The hail pounded out the windows on the West side [where the sign is] and did 3 million dollars in my homeowners association alone. They are still fixing storm damage here. It is 12' up, too far for an oldphart, so I have not looked really closely but if it was not for the 'C' I would just repaint it.
Just for reference. Gene
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