1. To remove pencil marks from unfinished wood, rub the mark along the grain with a clean rag or paper towel moistened with denatured alcohol (do not use on latex based painted surfaces, it will remove the paint). The alcohol will dry quickly & not leave an oily residue.
2. To remove glue left by a price sticker or other stickers, spray WD-40TM on a clean rag or paper towel, rub the glue off, clean the WD-40TM residue with a rag or paper towel moistened with denatured alcohol, the alcohol will dry quickly & leave a clean surface.