If I get a chance I'll do a video... But it's really simple thing to do and if ur bits are already in the shit box, you have nuttin to lose... After burning up and dulling out a bit after many many uses, I decided that before I throw the bit in the garbage I would try my diamond sharpener.. At first I tried by hand but cutting carbide even with a diamond was time consuming.. So I put the bit in a drill and set the drill on reverse cause you don't want the open side of the spiral coming into the diamond, you want to just do the back edges.. I eyeballed the angle as I spun the bit on the sharpener and stopped to check a couple times to make sure that the entire edge was making contact.. The inside of the spiral you have to clean the old fashioned way.. I give it a spritz of pitch and gum remover, let it sit for a little while then use a brass brush,, You all seen those diamond sharpeners at HD N Lowes... I didn't get mine there cause I wanted better quality... I called it a stone but that could be misleading... They are those plastic blocks that have the diamond infused plate on the top..
Mans Quest for knowledge,,, means he'll always find a way !!