I have heard of that and know people who just poured the wine over a
piece of copper flashing. Margalit's book has good info on testing, I
can get back to you on levels. Are you planning on using 1% copper
sulfate if necessary? I'm pretty sure I have data on that. If racking
fixes it the smell is usually gone the next day with a good rack in my
experience; maybe other have had it stick around longer.

Joe