2K toughness? Maybe I'm not rough enough, but 2 trips to Morocco and several across the Alps in my previous 110 and I didn't see anything peeling off or looking too shabby. I accept that I'd nothing to compare it with, but I think it still looked pretty much as it started after 4 years. I did repair the odd ding but the ease of using cellulose to touch up didn't really register until I read a bit about 2K. Would it'd have been easier with 2K? Dunno, but from what I've read I doubt it.
Cellulose works for me at an amateur level with almost no facilities. If I had a proper spray shed and extraction gear maybe I'd have a different view. And a lighter wallet.