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Quick help needed - brilliant white matt paint?

(8 Posts)
MaryTheBookeeper Tue 18-Aug-20 15:40:10

I'm painting a ceiling using half a tin (previously used) of Dulux Once. When I opened the can there was some slightly browny water on the surface which I mixed in thoroughly. The can is plastic not metal, so it wasn't from rust. Now I'm painting the ceiling it seems the old colour is brighter than the new paint! Has that watery stuff discoloured the paint slightly do you think? I'm now having to wait whilst it dries to see if it dries any better before I continue. I haven't known matt paint to separate out before. Anyone else got some experience here?

MissAdventure Tue 18-Aug-20 15:42:59

It should dry fine, from what I've found.
It does separate, but mixes back in with (hopefully!) no ill effects.

MaryTheBookeeper Tue 18-Aug-20 15:53:44

Well I'm now in the situation that the colour of the old ceiling I'm trying to brighten is brighter than the new white paint I'm putting on. That just can't be right. I don't understand it.

MissAdventure Tue 18-Aug-20 15:55:17

Is the original emulsion matt, too?

merlotgran Tue 18-Aug-20 15:55:41

How long have you given it to dry?

MissAdventure Tue 18-Aug-20 16:25:10

I'm thinking perhaps the original emulsion is a silk or satin finish.

MaryTheBookeeper Tue 18-Aug-20 18:43:27

Old & new are both matt. I'm going to give it until tomorrow to dry but I'll probably buy new paint.

MissAdventure Tue 18-Aug-20 19:04:07

Let's hope the night brings a miracle, and it all matches by morning.