[asudavew]

BTW.

I am going to run chicken wire around mine, then mortar, and then the stucco finish.

I think this will help improve draw....

I think a little mass will help to keep the chimney heated up.
Mine is just 18 gauge steel, single walled, so it heats quickly, but cools quickly too. So when the fire burns down, the smoke likes to hit me right in the kisser.

Anyways..
If the metal corrodes and rusts, then I guess the mortar becomes the chimney.
Or maybe the old one will come out in pieces, and a new one slid into place.

my 2 pennies

dave