A lot of blues can also be removed with plain old vinegar. This is one method that is often used on replica cap and ball revolvers to remove the blue in the process to "antique" them.
If a pair of '51 Navies were good enough for Billy Hickok, then a single Navy on my right hip is good enough for me . . . besides . . . I'm probably only half as good as he was anyways. Hiram's Rangers Badge #63