I recently moved into a home with a nice half-circle stamped concrete driveway. It has been painted grey and sealed, so I am told. We'd like to repaint it to match our new roof, probably some kind of earthtone sand/brown color, but have been given mixed information on what is required. The company that laid the driveway for the previous owner said it should be sand-blasted before repainting/sealing, which is quite costly. Another painter we spoke to, said this was not necessary and that we could just pain a new color right on top of the existing. Obviously the second alternative is much cheaper and therefore preferable to our pockets.
Whatever we do, I just don't want to be faced with peeling paint in 6 months, or any other problems for that matter. Is there any real reason why the cost of sand-blasting is necessary? Is there any special type of paint we should use? Thanks in advance for your help.