Well the thing about Rex's nanites is there was a HUGE explosion about 5 years back that pretty much blew them all over the world, so there are always nanites around. They're in everything and everyone! It's only every now and then that the mutations happen and remind everyone of their horrible potential fate. (Anyone infected with nanites could go monster, it's really just a matter of time.)
There is an instance of nanite visibility in one episode, but the person was so severely overloaded with active nanites that he turned into a fucking gigantic hulking monster, instead of just a regular monster.
However! High nanite concentration released into the air looks like gold sparklies (http://i56.tinypic.com/2s84vo4.png). They'll float around a little, too, swirling up into the air like leaves caught in the wind.
Nanites are held in many ways in Rex's canon, but we have seen them use canisters and also very large holding tanks. Depends on whether they're active or inactive, or how many there are.
no subject
There is an instance of nanite visibility in one episode, but the person was so severely overloaded with active nanites that he turned into a fucking gigantic hulking monster, instead of just a regular monster.
However! High nanite concentration released into the air looks like gold sparklies (http://i56.tinypic.com/2s84vo4.png). They'll float around a little, too, swirling up into the air like leaves caught in the wind.
Nanites are held in many ways in Rex's canon, but we have seen them use canisters and also very large holding tanks. Depends on whether they're active or inactive, or how many there are.
Oh, fuck, stop me before I TL;DR again.