When we moved into our house nearly 30 years ago the garage was converted into a room. The walls were covered with beauty board with vertical grooves in it. It was a wood colour and the grooves were black. We haven't replaced it - yet - but in the meantime I wallpapered it with polystyrene lining paper & ordinary wallpaper. It's only an ok job as you could make a depression with your finger on the surface. The hall was covered in the same stuff on one wall and we got that plastered, but the stuff must have been in fashion in the 70's!