Never heard of Tef-gel. Seems to promise some great things though, might have to add it to the garage. Got enough of these types of things that I should just do a comparison test. Still reading about it, but it seems like the main benefit of it is for very dissimilar metals, galvanic-ly speaking. Coming from an automotive background, I'd normally use nickel antiseize in that situation. Any reasons you prefer the Tef-gel?

As far as stainless fasteners... Well the above is actually one of the reasons I tend to avoid them. But if that's not a concern...

Edit: Here's my reasoning for the choices of metals listed earlier:

-Aluminum rivet nuts - last thing I want to see corrosion is the frame. Since this will sit direct against the frame metal and damage any coating I might try to apply, it seemed like a good idea to avoid a dissimilar metal.
-Hot dipped washer - very resistant to corrosion from the elements. The large amounts of zinc will act as a sacrificial anode.
-Screws - three main options are listed below. The zinc plated steel seemed a good compromise between the two others, and is also the strongest of the three if that matters.
-----Stainless steel (extremely corrosion resistant, but will cause galvanic corrosion of aluminum if preventative measures aren't taken)
-----Zinc-plated steel (very corrosion resistant and will not induce significant levels of galvanic corrosion of aluminum)
-----Aluminum (corrosion resistant, but not to the same degree as above. Practically no risk of galvanic corrosion with other aluminum)