I am doing a self build and was advised to ply the kitchen walls to ensure secure fixing of wall units. I have done this from floor to ceiling and intended to have the wall plastered (painted on top and below the wall units)as I didn't want tiles. I have now been told that you cannot plaster onto ply!!! Is there any bonding agent, mesh, tape I could use that can be skimmed onto?? Any advice appreciated as I don't fancy having to take it all down.