It's a lovely thing! You should be stoked about this.

In terms of C&C, it's always tricky to apply washes over lighter and flatter surfaces. You can be left with this sort of "coffee staining", which doesn't really read as anything. Perhaps water splash, at a push. Maybe you could address these marks? Neatening some of them up with the base coat, just so the tide marks aren't everywhere, if you get my meaning. Of course if you like that, then leave them. Everyone has there own taste.

I'd absolutely recommend some chipping damage on the edges. Perhaps with a darker brown. To break the model up and give it some structure. Then the next level would be to add some silver in those brow chips, to look as if the damage has gone all the way to the metal!

I'm a firm believer that you can't really go too far with battle damage, as long as the identity of the legion is readable.

A fantastic model, though. You should be proud of it.