Ressi SC 310 Ressi SC 310 is a ready to use skim coat plaster for a thin coat application on a rough plastered surface or a rough finished surface of Ressi PlastoRend 120 to provide a fine smooth finish leaving the surface ready to receive paint or wallpaper. Ressi SC 310 is ideal for internal and external application. Ressi SC 310 can easily be applied with a suitable plastering machine or by hand in accordance with BS EN 13914-1 & BS EN 13914-2. Ressi SC 310 can also be used as a decorative plaster and has a smooth velvety finish to the touch and can be used as an ideal smooth finished plaster with varying shade of colors and a cloudy effect colored feel.