I'm not quite sure about your information on the grease promoting resistance, if I'm understanding you correctly. Di-electric grease is recommended for electircal connections such as the boot over the terminal on a spark plug wire, etc. and I believe is for the purpose of locking out moisture as well as reducing exposure to other oxidizer promoting elements. I would recommend the use of this type of grease (di-electric) in all electrical connections on a motorcycle expressly for the reason of being subject (albeit at times unwanted) to moisture. Wish I knew more about the rectifier issues, brother, but I am certain of the greasy kid's stuff on the terminals. Hope that is at least some help.
('D' you da man! Way to go, org monster!)