3 day process. Day 1 rip out Day 2 first fix plumbing and electrical Day 3 plastering Now we leave it for 2-3 days until the plaster is pretty much dry before we start fitting units or painting. Painting is best done before the units are in but being on a tight schedule normally means fitting some units while the plaster is only just dry but not dry enough for paint. Sometimes the painter will come in and give the walls a base coat while covering the units with dust sheets.