Plastering onto plywood

[electrophotic]

The plasterer has just finished replastering my bathroom but has left about 1 sqaure foot where there is some plywood boxing-in. He said he couldn't successfully plaster onto plywood. I was hoping to have a paint-on-plaster finish to this area (not tiles). Surrounding plastered area is 4 to 5mm thick plaster, so it's too thin to nail on some plasterboard. Is there any way I can apply a 4/5mm skim of plaster to this plywood?

[thedoctor2]

HI
You can use metal lathing or chicken wire nailed to the ply bond it "pva" and skim , wood expands at a diffrent rate from plaster so you may get slight cracking .
Hope this is of some help to you