Exhaust Painting Question

I recently had the same question and posed it on this site.  What I ended up doing was putting down a coat of gloss black, then I used Alclad Airframe Aluminum along the sides and Stainless Steel for the area immediately after the burner cans.  I then shot magnesium here and there based on pics I saw on line of the real thing.  Couple that with some washes and pastel weathering and it came out pretty good.

What color would you use for the wash?

I'm taking a cue from another site where a base coat of Alclad Duraluminum followed by shading /streaking using Alclad Steel, Jet Exhaust, Pale Burnt Metal, and Magnesium. Burner cans will be treated with Jet Exhaust while the Exhaust manifold with Transparent blue.

No wash is needed if you use this method.

Great information, thanks y'all.