BLACK BOARD PAINT: -gives an attractive smooth non-reflective black finish formulated for interior and limited exterior use. It can be used on beams, panelling, decorative ironwork, dark rooms and blackboards.Please download the manufacturer's data sheet for full details. The NEW 2010 version of Black Board Paint is waterbased not white spirit based, the new weterbased version will filter through to our stock as and when Johnstones release them from head office.