Horus heresy. Black shields. Iron warriors. Spartan Part 1

So it beginns. First step will be to remove some elements. This spartan was made for space wolves. So there was runes and legion nr on the hull. All looked very nice. But i cant have that if i want this to pass as a iron warriors tank. The idea is the same as it was with the land raider. I want to make some sort of paint scheme that will be ok for both black shields and iron warriors.