A tip I use to detail items on my 69 Camaro Z28 such as bolts and hardware, brackets, and and any item that is plated such as the hood hinges, hood catch, etc., is to wipe them with a light smear of bearing grease then wipe them with a shop towel or paper towel. I keep the same wipe down shop rag, 1" paint brush, and a tooth brush in a zip-lock bag. During my spring oil change (typically in March in prep for the spring and summer show season), I also detail under the hood, chassis, and floor boards (bottom side of the car) with products like Fantastik and Mequiar's Quick Mist & Wipe Detailer.
I got this tip from some guys who restore and maintain Ford Model A’s which had many unpainted parts. The grease applies a light barrier to rust, and keeps the item looking almost new.
For an example, the rear leaf springs were originally heat treated bare steel, the drive shafts tubes were plain steel, and the steering box was plain cast iron. I use compress air to blow any debris off the leaf springs and steering gear box then use my “grease detail kit” to brush and wipe the springs, steering gear box, drive shaft, etc. I finished my Camaro restoration in 2000 and the springs, steering gear box, and drive shaft still look very good.
By the way, I do DRIVE my car to local shows (it the weather is dry) but trailer it to out of town shows.
Have a Happy New Year...and happy detailing!