Franchi:
As the "other thread" flogs on about, strip the gun down, degrease the bloody parts, and immerse them in Evapo-Rust overnight. You will have no CC and no bluing left the next day. Just a soft sheen of bare metal. This stuff does not eat metal. It converts the CC or blue into other substances. If it doesn't work, you're welcome to call on the Tidy Bowl Man.

Best, Kensal