In article . net,
"CW" wrote:

That BS has been going around for years. Do you sharpen your plane by
planing concrete?

"triker3" wrote in message
...

the proper way to sharpen scissors is to cut sandpaper

In the case with scissors it works to an extent. I suspect what it
really does is put micro serrations on the edge from the sand, and it
feels like it is sharper because it cuts (certain materials) better.