cleaning with acetone will certainly get rid of any dirt/grease on the basetape, but usually you have to scrape latex off with a blunt edge.
What Vitts were you using? I use the Pista CS and Pista EVO CS and they are latex-free. Not sure about their road tubs though...
I know other riders who use Vitt track tubs plus Tufo Extreme tape who've had the same experiences as you ie it sticks extremely tenaciously.
mickster