Yellow shadow basecoating.

For armor preshading, I'll use black in the heavy shadow areas and dark brown for the highlight areas (unless I want the primer to show through).

I think that you'll find most armor modelers using light and dark mixes of the final colors to give depth to the paint.

To get an better answer, ask this question in the armor section- there's some exceptionally talented modelers in there.

Thanks Dre,

I am thinking the same thing, i just thought maybe there are new techniques on bright color shadowing.

yellow and red are difficult to shade on large areas.

VS

Wait, you actually mean a bright yellow,  not the German dark yellow??  Sorry to have misunderstood that...

Going on a WAG here, but I'd think that slightly darker but duller yellow would work in the shadows with a more whitened yellow in the highlights.   But that would be post-shading, not so much a preshade.

You may want to spend some time looking at Caterpillar construction equipment to see how that ages and weathers.

Prime black. Give a complete coverage of the base color. Let that dry then mix the base color with 50% white. Use that lightened mixture to pick out the areas that you want to be lighter and avoid the areas that you want shadows. It will look hideous at this point. Once that dries go back to the original color and thin it way down and use that to blend it back together.