Hardness, surface roughness, and adhesion strength were determined for water-based opaque paints applied to heat-treated wood material surfaces. For this purpose, Scotch pine (Pinus sylvestris L.) beech (Fagus orientalis Lipsky) woods used as experimental material. Specimens subjected heat treatment at 3 different temperatures (150, 180, 210 °C) 2 periods (2 4 h) under laboratory conditions. Tw...