Chuck, the copper solvents I know about contain ammonia which will react with copper, producing the blue patches we have all seen. I have heard that some of the newer bore solvents are ammonia free but will still remove copper fouling. I don't know how they work.

The reason I ask about lead dissolving solvents is that chemisty labs use lead pipe in their sink drains or at least they did.
With the rampant plumbun-phobia in society today, they have probably switched to something else.

OB