<< the sprayed areas are light gray and the non-sprayed
areas become dark gray. Short of spraying my entire driveway with tire spray,
what can I put on it to either remove the sprayed areas or protect the entire
1200 sq. ft. driveway? >>
The only option you have to match the appearance of the light areas is to spray
the entire thing with the identical goop you put on the tires. Removing the
spots with TSP scrubbing might work but likely only after repeated scrubbings.
Or you could simply ignore it for a few years and it will slowly disappear. So
many problems arise in a new house that need urgent action that given your
situaution I would put the driveway appearance oon the back burner. Good luck.