Paint is showing through please help!

[darren7]

Hello.

Im painting in Dulux trade v matt, brilliant white. there was a stain on the wall, so I covered it with some white, oil based under coat.

The problem is the under coat is showing through, I have given it about 3 coats and you can still see it (all done with roller)

I dont really know what to do, the short pile roller does not really load it on that thick.

Any advise please.

D

 

[JohnD]

"Stain Block" or Aluminium Primer.

What was the stain?

 

[darren7]

no its not the stain its the paint..... it was a new skim on some of the walls, and on the metal edges I placed some of the under coat, as emulsion does not stick that good to the metal.....I should have just PVA`d the edges, as the paint is showing through there too.... just a normal oil based undercoat..... its white, but darker than the bril white emulsion.....and its still there after 3 coats...... whats best?

Thanks


D

 

[JohnD]

Maybe a couple of coats by brush, you can load a corner better that way. use the roller on a third coat to get the texture matching

 

[confidentincompetent]

Yep touch in with a brush first. Though I wonder if you are rolling out tooo much and not loading the roller often enough ie. not enough paint film.. I often use undercoat as a stain blocker and would have thought 3 coats of emulson would have been ample.. ... Roll it on like your not paying for it and you might get away with two coats in future......

 

[Nige F]

Short pile roller? .try medium pile plaster angle beads? I`ve not seen them primed

 

[Third_Eye]

Fill over the obvious undercoat area, that is now emulsioned over. Once dry, rub down filler, then apply a thin coat of emulsion and let dry. Then, over coat with one further coat. Then coat the full wall(s)

 

[confidentincompetent]

Short pile roller? .try medium pile plaster angle beads? I`ve not seen them primed

Usually prime angle beads to give emulsion something to cling to also the galvanising gets scratched with plasterers trowl...so a primer or solvent u/c will stop rust.
Forgot to say when using u/c as a stain blocker, thin it down and feather in.
Its the heeeeeet.......