Thread: Using Magic Marker as a honing guide ?!?!?

Back in the day when I was a mere lad and working as an apprentice in a machine shop there was an old guy who set up the filing, grinding, and polishing jobs for me to do each day....

He'd mark up the pieces of metal in different ways with the basic instruction...

"Keep (grinding/filing/polishing) on working at it until the magic marker is all gone."

When I graduated to more sophisticate EQ like a lathes, milling machines, grinders, & lapping machines etc... I got more or less the same instructions, but the foreman would mark out the work with a special blue or red machinst's dye and a carbide scribe...

Anyway, I sort of dimly recall that was also a good technique for marking out bevels on cutting edges.

I'm sure you guys have already been doing this for a long time, but for my sake...

Could someone please explain exactly how that procedure works when honing a Str8 edge razor.

Thanks in advance,

Tony