Two. Thoroughly clean the area. Get almost all of the dust off with a vacuum and after that a moist paper towel or fabric. I a short while ago started off wiping piece down with a TSP substitute and scouring pads (the TSP substitute doesn't must be rinsed off like http://kitchen-cabinet-painters95281.fitnell.com/36896483/the-2-minute-rule-for-paint-and-glaze-cabinets