Welcome to the Bunnings Workshop community @debby1. It's fantastic to have you join us and many thanks for your question.
If you apply 2 coats of Megatreat's textured primer over your Pebblecrete driveway you can then apply Megatreat's Liquid Sandstone. The primer needs to be applied at the rate of two litres per square meter. Both these products are available through the Bunnings Special Orders desk at your local store. If you need further information about the application or the suitability for driveways please feel free to contact Megatreat's information line: Ph 02 4982 2877