By no means comprehensive, and I have another ISD "in the oven" for completion:
X13 - Crimson Command - primed white then handbrushed Vallejo Game Gory Red, washed with a 1:1:10 mix of black ink, brown ink, water. Considering adding running lights in yellow & white to this.
Old Republic relic Victory:
Mini-slice fleet - I like how the "Imperial Star Destroyer White" contrasts with the others, local forces don't have the budget to go slapping paint all over everything, after all:
ISD Dark Side - various Vallejo Game greys, the darker segments washed in a heavy (1:5) red ink/water mix. Gives it a really sinister feel, which I like.
ISD Battlefleet: