X2 for the wax. Unfortuneately, you will never get a piano-type gloss finish using BLO as a base....but a few thin coats of paste wax (I like minwax natural paste wax) will buff to a decent shine. Make sure the oil is FULLY cured before applying though, or the finish will be cloudy (Two weeks is my minimum)
Alternatively, you could apply another topcpat over the oil once cured. I like the "secret mix" on a gunstock: 40% polymerized Tung oil, 40% Spar varnish (note: NOT urethane....varnish) 20% turpentine and a few drops of Japan dryer. Wipe on, wait ten minutes, wipe off. Wait 4 hrs then repeat.
Ryan