Peter, I've heard that stainless against aluminium is the worst possible combination.....?
A year or so ago I did a test which entailed coating 6 inch pieces of piano wire mounted into a wood block, with different things.
Acf, WD40, waxoyl, ordinary wax, engine oil and some others I can't remember. I then left this block out in the garden over winter.
Rather unbelievably, the best protection offered by a long way was WD40!
I hesitated to report it on the site here as there was plenty of anti WD40 stuff being said at the time about it being hygroscopic etc. However, my test prompted me to contact a client who is a real expert in the area who said that WD, whilst not as effective as it used to be because they had to remove some of the poisonous stuff, was actually just as brilliant as they claim. I hasten to add though, that my samples were subjected to no friction, which could change everything in a car situation.
Re salt on aluminium my expert recommended something motorcyclists spray on the front forks; you'll know what it is.
Lastly I remember using sacrificial anodes in my Triumph Herald in the 60's......they were called the doors!
Nick
