Just painted, and come unpainted if you buy replacements. They also have lots of nooks and crannies to hold water and road crud that help them to rust.
yes, I have noticed some red stuff near a weep hole in the bottom support tubing
Rodger 2018 M3W "Dreamers on the Rise" 2004 Plus 8 (wife's) old Goldwings and a couple of Harleys