Hi! can't wait to see the red Rambler and Metropolis! LOVE red (like everyone, I think). I am somewhat of a newbie but I've washed probably 15 bags so far and I have used Brasso on all of the brass turnlocks - should work fine. Initially, I was taking them off and working on them, then putting them back on the bags but I found it to be a pain.... so now, I've started rubbing the Brasso off while they are in the sudsy water - that way if/when I get some on the leather, I can quickly dunk and get it off! But.....if you call
Coach and give them the serial#, they will send you a new turnlock....free! I called and it took 10-14 days maybe, but I got two for the thwo different bags I needed them for. Good Luck!