First test: Tamiya Weathering Master (Rust, Gun metal, Silver)

Okay, so I've literally just spent about 30 minutes dabbing this little fella with a makeup stick. My girlfriend thinks I've gone mad. 

Before:

After:

It's very easy to use, and for weathering nuts like me, you can't go wrong. I applied gun metal first, then silver on the highlight surfaces, then rust just about wherever I felt like it. And I think it looks awesome! My layout is sure gonna be gritty when its finished.