Thanks to all who replied. I went to Canadian Tire and just grabbed a set of Torx drivers for around $24, and the #10 was the one that fit, BTW. Couldn't get geniune 3M Scotchbrite(tm), but the generic equivalent seems to work just fine. Removing the finish was easy but time consuming, and it looks like I've got another couple of hours left to go now that I've seen the blade in the daylight. One thing that I did notice is that the edges of the tang area were impossible to fully clean using only the scotchbrite. I would rub forever, and some areas would just never come clean.
Upon close inspection, I found the reason: There was a slight lip of metal present on many areas of the tang edge, which seemed to be an artifact from the factory blade stamping/blanking process. (So much for Benchmade's "laser cut tolerances of less than 0.00005 inch" as stated on the box...) This was preventing the pad from contacting the coating in certain areas, so I just wet sanded around the entire tang with some "fine" (no grit indicated) wet/dryp paper and finished up with the pad. Everything nice and smooth now...
I'm definitely happy with the results, even at this 90% done stage. The blade looks so much nicer now that one can see the angles and grinds more clearly, and the contrasting effect of the G-10 handles outlined by the satin finished tang edges is awesome... I'm not looking forward to cleaning out those thumb ramp serrations, though... And of course re-sharpening. This process really kills the edge, so if anyone else is going to do it, make sure you've got the means and skills to re-sharpen your blade from a depressingly dull state!