IME, it's not so much what ammonia does to the aluminum, as what it does to
the shellac and aluminum combination. ... an immediate gum formation in the
can if I start cleaning up with ammonia after spraying with shellac. That's
why I use alcohol on the can.

--
www.e-woodshop.net
Last update: 8/24/03


"Tom Bergman" wrote in message
I'm not sure you'd want to run ammonia through an aluminum sprayer
anyway. I would think the ammonia would blacken the ammonia
(oxidized?) since it's got a high pH. Alcohol wouldn't react with
aluminum because it's acidic.

I don't know that the black color would affect performance though.