I know this isn't specific to the FJ, but the Mr Clean car wash system works miracles on our black FJ. Spray on the soap, whirl around a bit with a clean wash mit, rinse it with regular water, rinse with the purified water. No drying, SPOT FREE, on black I think is pretty good.

 

Yeah Its pretty good but the filter has to be changed like every 3-5 washes so it will continue to be spotless!! But IMO its a great little system!!

 

i wouldint mind buying one but those filters aint cheap