I cannot emphasize the importance of maintaining the tin coating in perfect shape. I've had to replace 100 and 200 amp service entry boxes that were ruined beyond repair because some genius licensed contractor neglected to inspect a fitting. Ever see melted aluminum? I am attempting to encourage folks to annotate suggestions about aluminum fittings to append tin plated in good condition. When in doubt, replace. Tin plating is fragile - it is not chromium. How many dozens of bolted cable terminations have I replaced...
The 2 piece battery lugs that use ring threaded compression work on an entirely different principle. Still doubtful? Now go unplug and take the cover off your breaker box and start tightening set screws set in ALUMINUM. The enemy here is vibration. When houses get up and scamper over rough roads the same thing will happen. Forget Pazo or whatever the name of cosmoline product is - use something like T&B COPPER compound. It's stouter and lasts longer. Cosmoline was the "Hot Setup" in WW1 when they were shipping 30-06 to the trench troops.