Before painting the cupboards we gave them a sand with 120 grit sandpaper. Becoming lazy as typical, we utilised our orbital sander but you can totally sand by hand. You have only to roughen up the surface so it shouldn’t take much more than a handful of minutes per cupboard http://paintkitchencabinetscharl22864.jiliblog.com/55434235/top-how-to-paint-kitchen-cabinets-gray-secrets