Lol, I'd be fine with clear, red, black, blue or none, then I'd just dip it in whaever I felt like, or not at all. But, I certainly think it's worth trying - I've used some on tool handles that's held up well, and I'm sure if you are dipping them, the surface prep will be done properly.
Glad to help, or at least offer a suggestion.
I dont know to what solution I will conclude but your help was very apreciated Weg, thanks again.
If you find small cylinder registors please inform me