What is the proper way to make a good reliable electrical ground connection to the airframe tubes? My tubes are powder coated, so obviously this must be removed, but then what do I do? What kind of clamp, etc. will continue to make good connection for many years without corrosion problems?

I am talking here about things like grounding an antenna (ground plane). I know my main electrical ground wires must be run back to a common spot near the instrument panel. Although the same question applies to that main common ground which must eventually be tied to the airframe tubes.

Jim