I like this look, Tim - I may have to find a use for that extra Starkiller torso I have now. Definitely leave it brown. Model Master makes a "Leather" in its Acryl line - that's what I'd use to cover up the yellows. Then she'd look like a total kick-ass swash-buckler.
My only critique is that the arms look way too long - like she's part spider-monkey or something. I'm sure it's due to the two different source figs for the arms. It's real evident in the second pic - she looks like she can scratch her knees without bending down. If it were me, I'd trim off about an eighth of an inch or so from the upper and lower arms (one above the elbow, one right above her gloves) and re-drill the peg holes. But that might be a huge pain in the ass. Also, I'd drop her neck down just a hair too (Dremel a deeper hole in the head) -- again- it's only noticeable in the second pic - the first pic looks awesome.
Really cool idea -- I'm gonna have to give it a try myself
