What do you do for restoration on unpainted parts?

MMissile said

Once cleaned or new cast parts, can be coated in a lanolin type product [Woolwax]. I soak[spray heavily] new iron suspension parts, sit for a few days, then wipe off the excess before installing. None of my iron front-end parts rust.

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Woolwax...this might answer another question I have for down the road on doing undercoating. My car has mostly the old school rubberized stuff, but it does have new skin on it, including the rear outer fenders that just have the AMD black primer on them...was wondering what to use there even though this car won't see winter driving ever again.

Comes in spray can too and also clear...good for leaving the natural finish look.
Woolwax Spray – Rust Protection Lubricant | 12oz Can