Help with fog/marker/and turn signals...ground/corrosion issues

[AKcharger]

Hey guys I have a few lights out on the '70 and plan to play with them (one reverse light, both hood turn signals and I think one or both front fog lights) anyway I'm expecting the main trouble to be corrosion/grounding. So question is how can I remove the corrosion to bare metal to get a ground BUT not have exposed metal get corrodid again since it's bare metal?

I ran into this with the hood signals, got them working by geting a good ground then in a few months they were out again. 

Thanks in advance 

[Charger-Bodie]

When you get the connections all cleaned up coat the bare metal with die electric grease.

[AKcharger]

When you get the connections all cleaned up coat the bare metal with die electric grease.

That's a great idea! Thanks!