You can paint mdf! Even if you sanded and visible particle board. These are shelves for an upcoming bookcase. Some trim is wood, but most is engineered with fake wood grain. The dents already showed the particle board and some bubbles needed to be sanded down. If needed you can ask some wood filler to make it smooth, but either way PRIMER is so important! Comment for my fav primers - easy aerosol make it fast and convenient. Follow @thisflipskilife for more #paintedfurniture tips. #furnituremakeover #oldtonewfurniture #trashtotreasure #paintedfurniture