I like the look of sanding rough sawn to get those semi-ugly saw marks out of the timber as opposed to hand hewn timbers, I think are best left just axed or perhaps use a slick,plane or adze to take out some rough spots,but otherwise those lovely axe marks I think are my favorite "finish". I say forget the oils and finishes, just more money and time spent with perhaps inferior results. Look to the old barns and see their unfinished beautiful timbers that breathed and dried naturally and most still performing their structural duties quite well.. Don P , I am curious what an Osborne brush is? Happen to have a pic? tb