all Black. Its the PLA filament that I use. Then I prime it in either black, (for stone) or white or gray (for other structures) and then paint it.
For figures I do different things, prime it white and use a dark wash over the model before painting, or sometimes I do what is called "slapchop" I prime it in black, then use a drybrush technique of white highlighting over the entire figure.
Then there is another method called zenithal highlighting which is prime the figure in black, then using my spray brush at about a 45degree angle I spray the model from the top with white to give it the effect of sunlight over head then proceed to detail painting.
