White matt emulsion

I am informed that Dulux Supermatt white is the way to go.... apparently even on fresh wet skim plaster, this paint can be put straight on with no sealer or thinning required!

Dulux Matt IME (many experiences on ceilings) has good covering power. It will probably do what you need.

Dulux "Once" which I used, well, once, does do what it says, but halve their claimed coverage figures and roll it on generously.

Dulux. 1 coat is just enough over a grubby wall with a near colour. Not a bad idea to spot paint first, ie paint over any filthy bits then give the lot 1 coat.

NT

In article , GMM writes

I agree with Phil on the paint but think you're fooling yourself with the one coat business, it never works.

You can get 2 coats on in one day though, start early, wait 4 hours and re-coat. The results will be 10x better.

It does - sometimes, but you have to get liberal with the application. Mine was light to dark in one coat and I could not fault it.

I would say from "light" to "white" is perfectly reasonable with the right paint.

Sometimes 1 coat is enough. If the new colour is close, if you use high opacity paint like dulux emulsion, and spot treat bad marks first, it can be fine.

NT

Well, now it's all on there and dry, I can report that the Johnstone's 'Jonmat Premium Contract' did a very good job of covering a combination of very grubby matt white and pale to medium patterned wallpaper. Except for the bits I missed of course, but I can't blame the paint for that....