if you like tru-oil, there's another similar finish called "waterlox" that i think builds (fills grain) slightly better and is just as tough.
i've also found that leaving just a small amount of helmsman spar varnish in an open jar long enough to get real thick.if it skins over, which it will, just pull the skin off and the finish under the skin will be about the consistancy of honey. rubs on very nicely. i now have a small jar of it standing out at all times and use the lid to control how thick it gets. let it get thick enough that it runs very slowly, like honey, when you tip the jar and then just rub it in with your fingers untill it starts to get sticky.when that coat cures till it's just barely tacky, apply another coat. when it dries, rub it out with a scoth-brite pad lubed with spirits. it can be tinted with any oil based stain. i buy a small can of minwax stain of a dark red tone and scrape some of the pigment off the bottom of a the can and mix it in with the finish to achieve the tint i'm after.