Okay, so that's a bit of a lie. I've done decals before but it was longer than I care to admit ago. Anyway, they process: decal in water, water on model, decal to model, allow to dry, MicroSol on decal, smooth decal, allow to dry (repeat if needed), matte medium on and around decal, shades to blend and make grungy. I think it turned out great and wasn't too much fuss.
So for the Knight Tyrant I've put together a Rhino to act as a scenic base. The plan is to paint it as a Dark Angels tank (My buddy plays Dark Angels). So I'm putting down an initial metallic layer with rusting and then I plan to try the hairspray & salt chipping method. @warhammer40k