Painting plywood

[Lieutenant Columbo]

I intend to replace some plasterboard with the same thickness plywood.
I want the finish to be indistinguishable from the existing painted plasterboard.
Is there a paint or woodfiller or some other product that I can apply to get the desired result?

 

[ironsidebod]

Ignoring the "why" of doing this...I'd go for a primer and then oil based undercoat, maybe a light sand before proceeding with whatever paint I was using on the walls in the vicinity of the ply.

 

[Doggit]

You'll notice the different texture in ply. Go back to the other thread, and deal with it properly.

 

[Lieutenant Columbo]

You'll notice the different texture in ply. Go back to the other thread, and deal with it properly.

It’s a different job. No cupboards involved here.

 

[opps]

You may want to use a thin lining paper over the ply. It will help it look more like a plastered finish.

If the plywood butts up to plasterboard you will eventually have expansion cracks between the two substrate though. A substantially thicker lining paper might hide the hairline cracks if you line the whole wall.