I have not yet tackled the beast mode. I'm waiting for the release of Dragonstorm to see if I can use Steelbane to elongate the tail before I do the beast mode.
I like it! The white blotches remind me of limescale buildup, which I imagine is what you were going for. It really helps give it an ancient look, like it's just been sitting around oxidizing and having minerals build up on it.
Yep, that's the look I was going for since he's just been sitting around a humid ship. That's why he has black specks here and there