M6 TTL 'light meter-shutter speed dial' contact point issue

[trolin99]

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Hello everyone.

I have an issue with my M6 TTL. Whenever I turn shutter speed dial to 1/500 my light meter stops working but immediately after switching to different setting (for example 1/1000 or 1/250) it turns back on. After taking the camera apart I found out that the problem is the contact point between the light meter and the shutter speed dial. On the gold plated copper ring (or gold plated brass ring) there is a little scratch that I assume is causing the issue. See attached picture.

I can see that there are these little metal "forks" on the right side on the picture that are being dragged on that yellow ring. Those metal forks and the yellow ring is probably the contact point between the light meter and the shuter speed dial. Those forks probably scratched the yellow ring what resulted in that black mark on the picture. 

My questions:
1. Does anyone here know what material is this yellow ring made of? Is it indeed gold plated copper/gold plated brass? If so then the point of it would be to conduct electricity...
2. Does anyone know if applying "gold conductive paint" over the scratched point would fix the issue? I imagine the paint would need to be hard after application, otherwise it would be quickly scratched back...
3. Does anyone know any repair shops that offer replacement parts where I could get that yellow ring and replace it for new one?

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[250swb]

Good detective work, but I have no idea if conductive paint will be robust but it’s got to be worth a try. On the plus side if you know what the reading is at 1/1000th and at 1/250th you know what it will be at 1/500th. Problem is though once it’s worn through you don’t want the fork to drag any more of the surface off as it now has an edge to work against, so sealing with paint has to be better than nothing.