My question is whether to bother rubbing down the surface before
applying emulsion. As it's a primer is this necessary? However it is
solvent based and has produced a shiny surface, which leaves me feeling
I should treat it like gloss and sand it to give it a key before the
emulsion.
Any suggestions?
Cheers
Dave
Makes you feel it was all worthwhile doing, eh? (well, maybe!)
> I've then applied two coats of alkali
> resistant primer/sealer (International Paints) to prevent staining of
> the top coat, which my test patch proved is absolutely necessary.
>
> My question is whether to bother rubbing down the surface before
> applying emulsion. As it's a primer is this necessary? However it is
> solvent based and has produced a shiny surface, which leaves me feeling
> I should treat it like gloss and sand it to give it a key before the
> emulsion.
Is the primer oil or water based? If the former, I'd be all the more
inclined to key it first. I've had horrible results painting water-based
paint on top of oil-based primers; the top coat 'shrivelling up' in
front of my eyes as if I was painting over a greasy surface.
TBH, either way I think my gut instinct would be the same as yours - get
the sandpaper out...!
David
> Is the primer oil or water based? If the former, I'd be all the more
> inclined to key it first. I've had horrible results painting water-based
> paint on top of oil-based primers; the top coat 'shrivelling up' in
> front of my eyes as if I was painting over a greasy surface.
>
> TBH, either way I think my gut instinct would be the same as yours - get
> the sandpaper out...!
The side of the pot of primer mumbles something about using brushes
suitable for solvent based paints. A small test patch of emulsion
didn't exactly shrivel up but it looks streaky - so I guess that
means sandpaper time!
I really dont mind, after spending so long stripping 110 years of
varying finishes off the plaster work its worth doing the job properly.
Thanks
Dave