Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

http://z15.invisionfree.com/Alpha_Legion_Forums/index.php?showforum=7

That's the Alpha Legion painting forum, plenty of ideas there.

But it depends on how chaosy you want your legionnaires to be really. The Legion is known to "borrow" imperial equipment, so you can make them from vanilla sm if you so desire. We Infiltrate Everywhere! *cough* sorry.
If you go that route then removing imperial marking probably would be best.

Dont even need scales. Just take a marine from any chapter and paint a hydra somewhere on the model and you can call it an infiltrator