In realty, they’ll have marked it regardless. It’s a properly physical job and to do it properly they’ll be pushing carpet stretchers up against the skirting.I left it 10 days because that's what the instructions said in the paint for it to reach hardness. The more you know eh! Next time I'll leave it longer
The benefit of pre-painting is you can get a full coat of paint right down to the bottom of the skirting. The downside is you’ll need to touch in.