JOE-I got a tip on how to make a blackening licuid, 2 parts water-1 part hydrochloric acid,
the acid must be added to water at the end or else the mixture wil (explode)?.
I will try this with great care.
Hope this experiment will be successful then I have a very cheap recipe
and can use on everything of brass in the future.
Joe, I see the problem with frame 7 and 8 in the new revised edition, I want to solve the problem with a copy of the parts with the problem, cut them exactly and paste them upside down on the material.
Then they would be mirrored.