I read about the spectralock grout -- if I tile definetly will use it.
If I use stainless steel tiles (source?) can I install edge to edge
without grout?

Also, someone mentioned HARD anodize.

What about that?

I guess there must be a durability difference in anodize coatings?

I may just play with a 2 x 4 sheet of 1/8" 5052 -- brush it (and take
it to the anodizer as well).