Infusion Permanent?

Infusion is permanent and can't ever be taken off right? I mean, if you modify your infused armor with runes or insignia, then it will still be infused right? Thanks.

That is correct. Once a piece of armor is infused, it will always stay infused no matter what you do to it.

Thanks a lot.

Of course you may want to do the infuse run again if you use multiple armour parts.
My necro did it a few times so I had spare infused head armour for different builds.

Also, after I bought the Elite armor sets and tried to help out guildies in the Fire Isle quests, I get quickly reminded that it was the non-elite armor set that I had infused. When you get new armor sets, remember to do the infusion run again.