I would probably go with a desert basing scheme. They look pretty desert camo type to me. Depends what you want them to be I suppose.
The wash doesn't tend to make things shiny. But If it does, you need to paint over it using schorched brown again, Leaving all the gaps and nooks and crannies and stuff.
When you use vermin brown, I mean use that as a base coat for the lighter browns. The trousers and the shirt.
Cant wait to see the new pics. Hope there looking cool.