My electric shaver was getting dull and grabby. In years past I
bought a tube of sharpener at a small appliance repair store, but it
was lost in the great flood. I do have a cake of "bobbing compound"
for buffing metal. It is coarser than rouge. I cut off a chunk, put
it in a glass mortar and pestle and ground it up. At first I was
going to suspend it in light oil, but decided to use glycerin so it
would wash off with water.
I mixed it about as thick as hand lotion and put it in a small
squeeze bottle. A drop on each shaver head and running it about 15
seconds did wonders. I washed it off and lightly oiled the heads.
I have a cheap hedge trimmer that is put together with rivets and it
got dull. I applied the sharpening stuff along the touching surfaces
and ran it about a minute, again with good results. Much quicker than
using a file or dremel tool.
Honing powder would also be a good start for making the sharpening