For grease, I use Quicksilver 2-4-C, infact, I use it for everything. Don't use copper based grease.
For the backplates, a wire brush, a quick brush with some Kurust, red oxide primer then a zinc paint like galvafroid. Tbh, itl go rusty again.
There is a place on this planet for all of Gods creatures.........right next to my tatties and gravy.