Aluminium/stainless/copper is a pretty decent battery.
Aluminium anti-seize paste is better for aluminium applications, I use a Loctite stick version but others are available. For high temps with stainless there is a nickel based version.
https://www.ebay.co.uk/itm/WINTER-OF...YAAOSwxCxT0aFg
Actually that supplier has a great variety of stuff, I've had a few special greases etc from them.