Yes, but there may be huge differences in how it is done that may allow for rapid change. E.g., orbital reflector systems could be "turned off" within hours, o

Yes, but there may be huge differences in how it is done that may allow for rapid change. E.g., orbital reflector systems could be "turned off" within hours, or rapidly degrading reflective atmospheric pollutants could be reversed at the rate of decay, perhaps months. Of course, the advantage of any solution that will not degrade for decades is lower maintenance costs, but... Seems the ability to reverse or tune any solution should be a critical factor in selecting a geoengineering project.