I went to the local dealer who does this and asked him if I brought in a scrap of the ply I use, would he test it for adhesion next time he sprayed a truck. Nope, he answered, been there, done that. Don't have to test it, it works. He explained it adhered even better to the wood than to metal.

He had sprayed a pair of PA cabs for a commercial sound company in the next town as a test. A few months later, they dropped off 15 more pair to be sprayed. They have been very happy with the appearance and results.

Since then, I have seen these speakers at a few outdoor festivals, and they looked good, with no visible scars, scrapes, or road rash.

Just FYI.