I'd rather deal with the larger part than the forearm. That would be easy to remove without destroying/resculpting detail, could clipper the...
If you're going for the more khaki whites, I'd look at the recipes in vol 2 for Ariadna, those should be roughly the same. The brown on the...
The forearm is sculpted as part of Joan's leg, so it'd be a royal pain to remove it without a dremel and a lot of careful work.