Ann wrote:

expounded:

Belt sander or angle grinder is way quicker.

Ture, if you have one. I've got a dremel, so I use it.

I have a Dremel too, but I prefer to buy a grinder "bit" for my full sized AC
power drill and use that instead. The amount of grinding I have to do on my
mower blades would take too long with a Dremel. I also precede the process
with a wire brushing to remove all caked on grass and rust.

Dave.