Lobster wrote in message
Do you mean to dilute the first layer, or just brush it out very thinly
(against mfr's advice on the tin, incidentally!)
I'd brush thinly, but diluting might work better. Suck it and see really.
Whatever it takes to get a film of some kind that you can't easily scratch
off with your fingernail. Bear in mind that emulsion paint takes a couple of
days to dry fully. As long as you can still smell the paint, there are
solvents evaporating off and they're the ones to do with film formation and
the eventual toughness of the paint.