A file, diamond file, and one each of these:
http://svst.com/Shop/SVSTs-The-Final-Cut-Tool/
http://svst.com/Shop/SVST-Side-Edge-Bevelers/
They aint cheap, but they never wear out either. Most any shop can get them or online through any of their dealers. I prefer 1/2 degree base and 90 degree side - I know that's not the norm so take it with a grain. A gummy is nice to have too.