Prep for plywood

I have a customer wanting to hydrodip cornhole boards made from plywood. I know the wood needs to be sealed first, but otherwise I'm basically lost. If they used Killz primer sealer on the panels would I be able to just spray them with some base or intercoat and go straight to dipping as usual?
Comments
I'd like to try the corn hole board myself. I imagine naked ladies or reaper prints would make all my Marine brothers lose their minds haha.
I think a few hydro dipped outside table legs would be awesome.
You are welcomed to try, we would love to see the results. If you can deal with an imperfect end product, it might be just fine for what you want to do.