I would suggest getting some automotive sand paper from either Wal-Mart or a local Autoparts store's bodywork section. I would start with a fairly coarse grit even as low as 120 if they have it, but 320-400 would also be an improvement. The abrasive agent should be Silicon Carbide (SiC) and it should be black in color. If you wrap the paper around your triangle rods and secure it with a binder clip (alligator clip) so that two flat sides of the triangle are facing each other, you should be able to reprofile much faster than with the original brown/gray rods. Once your paper is loosing its "bite" into the steel, just move to a fresh part of the paper. This combined with the Sharpie marker trick (search youtube for a visual aid for how to do the trick) will greatly improve your success. I encourage you not to give up and have someone else sharpen your knife for you. You can do it, and it should not take nearly as long as it had previously been taking before the SiC paper. You can do it!!! Let us know what you choose to do and how it comes out.