Painting fibrous plaster cornice

[DIYedboy]

I've just screwed up fibrous plaster cornice in an edwardian house. I'm ready to paint it but I'm not sure of the right method. I was thinking of putting on a coat of stabalising solution then emulsion. It's cost a fortune to do so I want to use the right method................once you've told me what it is!

 

[TheDec]

Fibrous plaster will accept any paint system providing the first coat is thinned, so a mistcoat first would be fine. Yet I always prefer to apply a thinned oil based undercoat as the first coat.

Dec

 

[DIYedboy]

Undercoat..............that's interesting, why that and not thinned primer?

 

[TheDec]

The only need here is to offer a bond to the plaster in order to apply future coats of paint, a thinned emulsion will offer this yet I choose to use a thinned undercoat as the first coat. This is not a situation in the general sense of the term a primer is required.

Dec