cuddle_nuts wrote:Do I have to actually paint the Lord with the mark of nurgle? Do I have to paint the
PMs green?
My primary concern is if I go to a tournament and someone decides to enforce rules that I am currently ignorant of, like you have to physically mark your chaos units if claiming a mark, or that certain units have to be certain colors (if they are claiming to be a certain unit type, as opposed to another).
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There is no such rule in the books. You can paint your army rainbow colours if you want. As long as your opponent is aware of what army and what chapter/etc of said army (including marks, etc) you are playing then all is well.
That said, not being a fan of Chaos generally that pic you have there looks like a good one to me! I hate the slime green chaos as well.