I've made the window reveals with cement and plastering sand. How long should I let the cement cure before skimming it with polyfilla? If painting, the answer seems to be 30-45 days, but if skimming with polyfilla, how long must one wait?
Just found this on plasterers tips website for you. :RpS_thumbup: "When skimming polyfilla over sand & cement one must wait at least 21 days before any polyfilla activity commences, if this advise is ignored structural defects will occur"