In the last year, I have secured and restored several vintage kettles. Rusty triangles are almost always the most time-consuming portion of a clean-up (ashpans are close). I use the WKC webpage as a guide, and generally, I've had good success removing rust. After a year, though, I've noticed rust re-appearing on previously cleaned triangles. I do cover my kettles. I've been contemplating giving the spoke a light wipe down with WD40 to help. Seems like it's continual maintenance item if I want to keep them rust free.
Any other suggestions? Thanks in advance.