Wow, thanks again, everyone.
I painted my model with mostly Floquils bought off ebay.
Some Testors enamels were also used in a few spots.
I read that a lot of Luftwaffe colors are used on Boba Fett, and thought there was a chance that some were also used on the X-Wings.
So I tried a few:
Gleb RLM 04
Hellblau RLM 78
Lightgrun RLM 83
Olivegrun RLM 80
RML 04 is a pretty good match for yellow/orange color used on Red 5's left can. To my eye it's closer than Reefer Yellow which can look a little green.
RLM 78 is a pretty good match for the light blue you see on Red 3's cockpit. (It's not even close to red 5's cockpit, however.)
RLM 80 and 83 are all over the Fett costume, and they're what I used on my green panels - though I think I went a bit too dark on them.
Anyway, the rust.
The rust color is a 50/50 mix of RLM 04 and Floquil Light Rust 2 enamel stain.
Testors owned Floquil, and I think is still making this stain and calling it "creatfx rust #2". It's so close I can't tell the difference between the two.
Another close match is Mig's Light rust enamel wash.
I brushed it on undiluted first, then thinned it with Mr Color Leveling Thinner (thanks for the tip -... . .- --..) and lightly airbrushed over it in spots.