As usual, Tubal Cain's video is highly instructive. I would like to add several observations of my own:
1. Never Seize is just about mandatory for assembling stainless fasteners in aluminum parts, such as in outboard motors. For use in exposure to saltwater, be sure to use the nickel-based product. Standard Never Seize is copper-based and copper-aluminum contact in the presence of saltwater leads to galvanic corrosion. I have been a sailor for 40 years and have spent three years in the tropics on my boat, and I use one of 4 products on all fasteners: Locktite if I don't want it to vibrate loose, Never Seize in larger fasteners in engines, and either Tefgel or lanolin on fasteners I will want to remove easily. Tefgel is pricey but a little goes a long way and it won't squeeze out at higher temperatures. Otherwise, common lanolin works well and is cheap. Another possibility to keep fasteners in place is RTV silicone sealant, but it is messy to use. Both Tefgel and lanolin also help retain fasteners as they are somewhat sticky. (You can buy Tefgel online; Tufgel is NOT the same thing!. Get Lanolin at a drugstore in tubes or jars -last time I bought 1 lb. for $16. Chandleries sell a modified version called Lanocote which applies more easily.)
2. Brake cleaner is a great solvent but don't ever use it prior to welding. Numerous cases of illness have been documented when so used. Prior to TIG welding, I wash parts with degreaser spray and lots of hot water, and wipe with acetone just before welding. When dry, the acetone will leave no residue on the metal.
Craig