Hi EJ
> nForm bowls with the foam band
No, slipped that off as useless and extra weight. It's just a neoprene foam band, like the Jetboil ones, and totally superfluous imho.
> you want to avoid scratching the surface of the bowls, what do you use to clean them?
Hot water with 2 drops of biodegradable detergent in the MSR pot, as a washing up bowl. A natural sponge as the wiper (bought in a French supermarket I think), but most any sponge would do. Wash up every night, never get sick.
> Do you have to avoid using a metal spoon or spork/foon with them?
GSI plastic cutlery – lighter than titanium. Actually, usually just the spoons, although on a few trips I have taken the forks as well, for long fettucini pasta. Forget the knives though. See
http://www.backpackinglight.com/cgi-bin/backpackinglight/gsi_lexan_cutlery_spotlite_review.html
I have one steel (butter) knife, but it never touches the bowls. I use a 1 mm sheet of PE as a cutting board on long trips: sausage, cheese, bread … That IS cut up a bit!

> Why protect the outside of the bowls from minor scratches?
Yeah, well, … good question. :-)
> So in winter you still take the nForm bowls but don't nest them in the 1.5L pot?
We take the nForm bowls on all trips, even to Europe. In winter we sometimes put the bowls inside the pot with the Xtreme stove and the Powermax canister outside. Things aren't absolute … :-)
> My Xtreme stoves came with nylon stuff sacks – why not store the stove inside
> a stuff sack and then in the bowls, or are you worried about the sharp stove
> rim still scratching the plastic through the stuff sack?
Yep, I often use the Xtreme stuff sack, but not just to protect the bowls. By having the Xtreme stove hose neatly coiled up inside the stuff sack and then inside the pot I can be fairly sure the hose won't get kinked and damaged. That concern is actually far bigger than the bowls!
Cheers