CRC Lanocote. It is based on lanolin and the dark version has fish oil also.
It is used extensively in the marine industry for corrosion inhibiting, especially where two dissimilar metals are in contact. The lanolin penetrates into the pores of the metal and just does not seem to come out.
You can get it as a grease or as an aerosol. I use the grease for protection on battery terminals. It creeps through the whole assembly and really seals it up good.
Renewable power systems - hydro, wind and solar.
Grid tie and off grid (stand alone)