How do you neutralize the sulfuric acid?
Venus does have the advantage of having enough atmosphere if we can make it non-toxic. But we need a way of trapping the sulfuric acid. Maybe a designer bacteria, that can survive the high temps and the acid?
Perhaps so, after dilution.
This is interesting:
http://en.wikipedia.org/wiki/Sulfuric_acid#Sulfur-iodine_cycle
What do you do with the sulfur after it is out of the atmosphere?