Unlocking skins in PVP?

Hi all. I can't find answers on this. Is the only way to unlock skins in PVP through playing/winning tournaments in GVG and Hero Battles?

I think I understand the character limitations to unlocking things, but why can't we just unlock using balth faction? I think (or at least I hope) I'm missing something here.

I've looked on wiki and at these forums, but can't seem to find anything that really explains the details of the new system. Any help appreciated.

Lady Maestro

edit: balth "faction" not balth "spirit"

short answer : yes

Long answer: yes indeed

Some details are explained here http://wiki.guildwars.com/wiki/Tolkano