HULLS, metels and alloys

[Lord Excalibar]

dont worry about it.

[Rise Of The Phoenix]

I'd say that the Asgard's alloy mentioned in Small Victories would be pretty tough, perhaps with some energy absorbing properties and assuming the Asgard gave us all of their knowledge then instructions on how to make the Alloy should be contained in the core.
It must be the best ship building material the Asgard knew of as they built quite a few O'Neills out of it and the Daniel Jackson class looked similar too, so that may have been made out of the same metal.

[Orii]

do you know how many bike frames are made from nanotubes

Exactly zero.

or how many nanoparticles are in common sunscreen and paint

A lot less than there are floating around in the air in your house, or in a pond, or in your front yard, or...

Nano is a size reference, not a bucky-carbon structural reference. Naonparticles just mean particles under a certain size. We've been using them for a century but didn't apply the cool name to them until carbon nanotubes and other bucky-structures made news.