Papering over fresh plaster and plasterboard

[Rsian]

Hi,

After some advice. I am papering one wall on a fresh skim of plaster.
All walls have been sealed approx. 80/20 with a full undercoat on top of that.

On the one wall which I will be papering, should I apply another coat? Would paint suffice or use a specific product?

Also, there is a small corner section (45cm), which is just plasterboard (no skim), which had the same treatment as the plaster. Will this need any other treatment before papering?

Thanks.

 

[joe-90]

Zinsser Gardz is best.

 

[Rsian]

Thanks, but only papering one wall and it would never get used again.
Will another coat of paint do, or have I sealed it enough already?

 

[xr4x4]

Pva?