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I have been purchasing 1/2" Simpson® brand MDO, factory primed on one side. The un-primed side is factory stamped as 'Simpson Backer'. Now I have a customer that needs a two sided 1/2" MDO sign and the local supplier no longer stocks two sided material.
I have several sheets of the primed one side material in my inventory, and he guy insists on wood, not AlumaLite.
This 'Simpson Backer' looks similar to the old unprimed material, and my supplier claims that it is 'not required' to paint it.
My question is, has anyone successfully primed and painted this 'Simpson Backer' side, or are there paint adhesion issues with the backing?