Camping Heater

Comments (1)

1. Fordman says:

   August 5, 2011 at 8:54 am

   I believe that you would have to mechanically remove the carbon. Wire brush it, maybe try a pressure washer, and if all else fails, then you could call a repair company and have them scarify the patio. This would involve removing a very small amount of concrete from the surface.

   You may also try muratic acid on it before you start removing concrete.

   good luck