On 20/03/2015 01:23, harryagain wrote:
wrote in message
...
I am about to paint a wall (emulsion) that has a couple of grease stains on
it, would PVA act as a sealer? The 2 spots of grease are about 4 cm in
diameter.

A few years back I thought I'd do this.
The problem was that the emulsion paint didn't "soak into" the wall
afterwards and went on very thin and patchy.
I had to put on several coats. It seems to have stuck OK, no peeling off or
anything.

So unless the surface is crumbly I wouldn't do it.
The paint seems to need the porosity to get a good dense thickness to stick.


I would try to get the grease off with some kind of solvent


I am going to try sugar soap and see how it goes.