Painting after a plaster skim

[KaraK]

Can't seem to find a consistent answer to this one on the wider internet so thought I'd run it by the PH experts... I'm having the walls in my home office re-skimmed over the next couple of days (should mainly be a skim but there are a couple of deeper holes under the windowsill that will need some more substantial attention and I'm wondering how long to leave it before painting? Everyone seems pretty much in agreement that doing a mist coat first is a good idea (although the ratio of water to paint seems to take on almost holy significance between the different camps) and I've got buckets of plain white emulsion which, assuming it's vinyl-free should be good to go for that. Am I mad to think I could look at doing that not this weekend but the weekend after? If it's better to wait longer then I can do that I'd just need to re-adjust some of my other plans