Those will clean up fine.
Disassy with care, clean rubber with soap and water, light degreaser, solvents usage should be minimized and dress with protectant.
Unwrap - unbend clamp, degrease in solvent tank & power-wire brush the steel clamps, preserve via your favorite method.
blast?, Boeshield natural steel, prime & paint? or plate (Clear zinc) * it seems they were orig natural. (I chose the incorrect method of clear zinc, mine look good & I drive my car)
Clean up hardware via plating or blasting or plating Phosphate bolt and clear zinc Nut & lockwasher, or, purchase NEW (Replacements) from AMK.
Reference: The 69 AIM UPC 3 Sheet A5, Staiblilized Shaft, View A Items 10 thru 14.