Thanks for suggestions. I noted also that the boom clip lever pins have started to rust! Surely they should be stainless.
Hmmmm, I think at best you will find the metal to be "Stainless-ish" steel or 304L which means it know's someone, who knows someone who once met a real piece of stainless steel. Do yourself a favour and buy a spare set of clip ends.......that is rust........and they will break. In future wash boom with a hose after use.
Sh#t like that just let's them down everytime.
AB....