What gunnut69 said is basically true about the BLO, boiled linseed Oil. Besides, it is not a really good protective finish. While Tru-oil may be OK to use, I've never used it. I prefer other products. One is a polyurethane product from Minwax, called Wipe On Poly. You apply it with a cloth, adding as many coats as you want till you are happy. Only problem with it is on a light wood, you will see the yellowing typical of any polyurethane product. Its available in satin or glossy. Another product to think about is any of the so called Danish Oil finish products. Actually a BLO type product, but with other additives that make it more durable and water resistant. You can brush it on, let soak into wood, and wipe off excess before it is too dry. Another product, that you do brush on, is another Minwax product called Clear Guard. Made for clear finishing outside furniture. Yes, it does dry clear and to a hard durable finish. Like most products you brush on, always a potential problem with runs, but easily dealt with by sanding with a very fine sandpaper when it has dried completely,leaving a satin finish.