hopefully not lucas electrics?well i got motivated enough to flush my cars brake fluid,been three years,wasnt black but i couldnt see the bottom of the reserviour with a torch/flashlight through it,i have a good cheap copy vacuum sucker thats a siphon thing powered by your air compressor,had it coupla years works great,fast n easy!works best if you teflon tape the bleeder screw first,that blue haze must be from when i held my foot on the pedal afterwards to be sure its all holding,probably released a little of the old fluid from behind the seals?