It's important to note that this is really, really messy. I spread a lot of newspaper to do this own, but even so it went all over my hands, clothes and so on, so be warned! But lets let the pictures do the talking!
We started here - painting done and a bunch of normal scratch/dent weathering applied, as well as some wash to darken down the recesses in the tracks and around the hull plates.
Rust! Actually i think this is slightly over-applied on the tracks but it's a lovely effect overall. I think i was expecting to be able to spread it around more easily from the initial application site, but I quickly learned that i got effects from dabbing the brush around rather than using it like a "normal" paint application.
that said, i've falled slightly in love with weathering powders - they're a ton of fun to apply, have a really nice effect and I'm off to try them on a couple of figures next...