The weathering on this one was a pretty basic technique. In a nutshell, here's what I did-
I started off with a coat of Krylon Rust Tough "Ruddy Brown" primer, because it has a rust-like color. There are other, specific alternatives (such as the stuff from Floquil) that more closely resembles rust, but I usually go with the Krylon Ruddy Brown because it's readily available. I then sprayed over that with Krylon Olive Drab, and covered over that with the main color- Rustoleum Sage Green. Then I carefully wet-sanded the cab, to expose the layers of Olive drab and 'rust' beneath. I wasn't as concerned about burning thorough to bare plastic on this one as I'd normally be- the Orange Blossom kit's cab is molded in (wait for it...) orange plastic, if it were white or gray plastic, then you'd need to touch up the bare spots with rust-color brush paint. After I applied the Miller decals and BMF on the windsheild frame, I applied some Rustall which helped to 'tint' the Ruddy Brown primer and bare orange plastic. The cab was then hit with a light coat of Testors Dullcote.