I think if the pavement is asphalt maybe try a hot chemical like gasoline...
On concrete?
Maybe the same?
Lacquer Thinner is pretty hot also... but expensive
The jell paint stripper is 65 a gallon plus tax, probably going to use over 5 gallons.
God bless Texas----------------------- Old 300 I will remain what i am until the day I die- A HUNTER......Sitting Bull Its not how you pick the booger.. but where you put it !! Roger V Hunter