Just finished mine. The black fender flares were looking really ashy and gray on the ranger. Just finished and it looks very distinguishing IMO. I suggest anyone doing this to wait for semi cool temperatures before starting. The dye conceals pretty quickly in high heat as you might expect.
2004 FX4 4.0L SOHC 5 speed manual. Mod list: Throttle cable, blinker, headlight, torsion bar (1.5"), intake mod, Pioneer DEH 9400, RF 10" shallow punch DVC 300 watt rms, retrofit bixenon projectors, red painted calipers and drums, red painted tow hooks, bull bar, 2" shackle lift.