Re: saving the patina
I have had good results with a 50/50 mix of boiled linseed oil and mineral spirits. Wipe it on with a rag and buff it dry after a few minutes. It dries hard overnight or in an hour or so in the sun. You can make it shinier by using more miniral spirit in the mix or flatter with more oil. You need to put it on monthly if you park outside all the time. My AA was total surface rust and my Hudson is broken original paint; they both look great and it halted any further rusting.
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