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I plan to enclose it in stucco, unless I hear that there is a lot of concern regarding its longevity. If it is not going to last, then I might try to leave out of the stucco, or have a new thicker one made.
Thank you for your reply.
San Luis Obispo
"Pizza is suffused with the good feelings everyone has because they're together," Chris Bianco of Pizzeria Bianco.
A few years ago, I was having a driveway cut in to a field, and suddenly, there appeared a shiny metal piece. I thought it had fallen off the grader ( heavy equipment to do the digging). It turns out, there was a hole that someone had used for trash 60 years ago. It was long since forgotten until we stumbled upon it.
I unfolded this piece of stainless steel and hammered it out a bit. I plan to use it for my chimney cap eventually. It is fairly thin, probably similar to your hood. It is an amazing material. Still durable, shiny after being buried for years.
22guage is pretty thin but should be OK provided it is 304 or 316 grade stainless.
I made mine out of a lower stainless but 16 guage (or 1.6mm thick).
The only problem that you can expect is the stainless to 'rust' and it will if it gets hot and oxidizes.
I used to make stainless quick releases for water ski display and delta wing kite flying behind a boat and the 316 stainless always rusted where the metal was heated or oxidizes/welded.
The oxidised areas need to be 'passivated' or 'pickled' using passivating paste which consists of equal proportions of nitric, sulfuric and hydroflouric acids.
See how it goes.
My hood has a little rust on the weld spots but will taked years to penetrate through the metal thickness.
If you don't succeed the first time, try again and again until you get it right!