Is there anyway I can use the steel legion skin in normal WA if I'm not playing the Steel legion MOD?
Yes you can. But if you took there skin that would be stealing. So it would be best to make you're own look-alike skin"
What Kamikaze said.
What part of the skin is it that you liked? because the vehicle skins would be comparatively easy for someone to recreate, the troops would basically involve a new mod again.
I've never played the Stell Legion mod, but someone called Soleil-rouge has some camo vehicle skins in progress over at Relic Forums.
Remember if the 2 models dimensions are not the same the skin will look wrong or be non-existant.