Richard, Hello
I'm not sure if there is a correct amount. I reference an article by
Andrew Westcott. He tried various % and wound up at 10%. He is
primarily concerned with restoring small artifacts. Then---other than
small, maybe our Healeys qualify.
Google his name. Interesting web site.
Dave
PS I forgot to mention Wescott says to keep metals other than iron
out of the tank. I stripped a steel part with a brass rivet and it
worked fine. maybe it degrades the solution.
On Feb 11, 2009, at 7:21 PM, richard mayor wrote:
Hi Dave, I only have one question, regarding the washing soda. I have
always thought that you only need to use about one tablespoon per
gallon. Does using more enhance the process? Richard
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