Tankluver
How do you do shadows on uniforms that's base color are black? I usually use the Andrea miniature paint sets that have varying degrees of shadow and highlights but how would I do shadow and Highlights for a Tanker in an all Black uniform?
Don't use black, to start with. Use a dark charcoal grey for the base color. Then you can use black or other dark colors to mix with the charcoal grey for shadows. That tip, I learned from Shep Paine's "Tips". That was how he painted the Panzer crew uniforms in his Monogram dioramas.
Black by itself is too dark and doesn't look right in scale, in this application.
I can think of another example of a black object-Frank Frazetta's "Death Dealer". He's mounted on a black horse, but if you look at Frazetta's original painting, or if you get to see any renditions of the resin kits that are out there, you'll see that the base color isn't black, but a very dark charcoal grey. The shadows, then, have some black, dark blues, and dark browns, while the highlights are rendered with greys in various shades.