Welcome to Librarium Online!
I'm trying to decide my camo schemes for my tanks. My troops a painted a smiliar pattern to the cadain models, desert yellow for the clothes and catachen green for the armor, then I highlight the armor with a catachen green/space wolves grey mix to give them a weathered look.
I like the mars pattern tank camo, but I'm don't think it would blend well with the army, conversly, I'm also thinking of paint the the tanks the same way as the troop armor, catachen green/space wolves grey mix . It's the choice between a more standout design versus something that blends in a little more to the army.
Here's the link for the mars pattern scheme as well as some others.
I think you have to pick something that will fit with the rest of your army Dr. Paris, that could be anything ranging from any shade of green to yellow really. If you like the ecclectic feel then go for the Mars pattern, but personally I don't think the ecclectic thing works for guard - regimental cours look far more effective.
I would also recomend checking out other sources, try borrowing the Imperial Armour books, or check out the internet for other inspiration, ie. the gallery here or Coolminiornot.
hope this helps.