[slijin]

What we do is run a stick of lube (I'm not sure what type, it's a thick pastel-y bar) along the blade right before letting 'er rip on the stock, then we just drop the saw and watch it eat through the aluminum. Most cuts we have are usually almost perfectly square; if they're not, a file takes care of the rest.

One thing I would like to make note of though, is that horizontal bandsaws have a hard time chewing through flat slats of material (although it seems much more obvious in retrospect). For instance, when running a cut through a 1x1 channel, the first side of the channel will take the blade a bit of time to saw through, the two sides of the channel that are ~perpendicular to the blade disappear within 1-2 seconds, and the last side takes a bit longer as well. What I do to counter this (because it also unduly stresses the blade) is drop channel into the clamp at an angle, so that it's not actually flush witho the base of the clamp. This way, the saw has a much easier time of cutting through the material.