Hello from a beginner...
I\'m prepping some antique woodwind castings for a replating job. I\'m actually going to try Copy-Chrome on these (not trying to be \'authentic\'... technological progress is a good thing in my book
The base metal of some of the castings appears to be bronze or brass, the others are a white metal... possibly a nickel silver? It\'s quite soft.
Some of the old [apparently] nickel plate remains. As I have a good vibratory tumbler, I decided to try this first rather than a pickle (I\'m uncertain about the plate metal and base metal). I\'m not actually used to using the vibratory tumbler on metal, so humbly beg for some sanity checking.
After a five hour run with medium ceramic triangles, most of the plate is gone, but not nearly as much as I expected (the base metal is fairly soft), and the result is a little patchy. The parts involved are small (started on the posts first, about 3mm x 5mm). The triangles don\'t seen to be getting in to the tiny corners nearly as well as exposed surfaces.
Is this just an example of \'have patience and let it run longer\', or would you recommend an adjustment? In case it helps, the parts I\'m trying first are the posts from an old (1930-ish) Kohlert bassoon. It\'s a common practice today to case-harden posts, not sure if these are as well.
Monty