Using Shellac based primer or similar to seal wall before em

[acknowledged74]

Hi

I have very old wallpaper paste (basically impossible to get off) and stains on several wall in our house and need to emulsion over the lot.

I've heard that I could use a Shellac based primer to paint over just these bits (rather than the whole of every wall), then give it a couple of coats of Magnolia emulsion?

Actually is it ok to emulsion paint over say a oil based undercoat, this would probably do the trick? Do you have to rub down after to get the emulsion to take?

 

[JohnD]

...old wallpaper paste (basically impossible to get off)...

Why is it impossible to get wallpaper paste off? what have you tried so far?

 

[acknowledged74]

Impossible maybe a little over the top but very difficult.

 

[JohnD]

what have you tried so far?

 

[TheDec]

You really should consider removing the paste before painting, warm water and a wide blade scraper can achieve wonders. If the walls have been prepainted you could also use sugar soap, any remaining stained areas could then be sealed with a shellac based primer.

Dec.