I am using a cheap white matt onto painted wallpaper as an undercoat for a color finish. There are two big patches where I can't apply a second coat because the roller just wipes the first coat right off, the cutting in was the same as well with the brush just moving the paint around and it not sticking. Do I need to rub it down and start again with another paint?
Matt emulsion not sticking
- Thread starter Jpaul
- Start date
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wall is contaminated, needs a clean before you proceed.
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You will need a coat of this http://www.zinsseruk.com/product/b-i-n/ , let it dry then paint as normal.
Mike
Mike
sounds like your too slow applying the paint so, when you come to lay it off it has formed a skin wetting the old paint and the roller just picks up the partly dried skin. maybe you got the heating on while painting ? work methodically keep a wet edge , work from ceiling to skirting in a section say two roller width's , lay off as you roll don't skimp on the paint leave an even layer of paint..
thank you all for your advice. I actually used an oil based undercoat in the end and it worked perfectly. I didnt realise that painting could get so scientific. the undercoat took 24 hours to dry sufficiently to paint over and I am knackered
I have found this to happen when painting emulsions over oil based paints, as you try to spread paint with a roller, with up and down strokes to give it a smooth even layer, then the paint starts lifting off as the roller becomes more tacky, so in the end the trick was to load more paint and roll it in one direction and then just leave it to dry, if you made further attempts to smooth it out the paint would start coming off, it was absolutely pain in the back side, but took me a fair bit of time to cover a small box room. Not only that the tenants had painted deepest oil based blue paint you can buy on earth! it needed two coats of brilliant white then magnolia as a final coat.
Of course you would need to key the gloss first with some sort of sander, this has already been suggested above by others, I had to do that with a 80 grid sander, this enabled the mat to key in so that when it dries it won't chip away. But I was talking of when rolling back and forth is when the roller itself would cover the wall in paint in one direction and then in the opposite direction it would lift the paint back out again, this was getting me no where, so in the end I rollered only in one direction, the paint is still stuck to the walls, hasn't chipped away and seems it has done the job covering over gloss paint.
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