Got to be careful here! As on the outside of a turning, make a groove to
mark the area to be burned. Now the tricky part. Whatever you use to 'heat
up and make the mark' must not cut through that which is being burned!!
Remember, it is not the wood that is supposed to get hot but rather the
medium and then the medium burns the wood.

As smart as I am, I cannot think of a damn thing you could bring to bear as
a 'friction burner' implement in this situation, howerver, I'm sure someone
here will!

You might consider a well controlled pyro tool of some sort to burn the area
in question.

FWIW Tom


"George" wrote in message
...

"Woodborg" wrote in message
...

Hi all

If you use a thin wire to burn the outside of a bowl or spindle, what
would i use to burn the inside of a curve surface such as a bowl.
Mark

Edge of a Formica sample. Smells a bit, but works.