Paint the driveway black...
Dont light gas on it as it could cause the concrete to explode.. and youll be left with holes.
Get silt from Rubicon Springs as that seems to stick to everything and covers what it touches..
Gunk do a foaming water rinsable degreaser.. use that.
Or dig the driveway up and cover it in boulders which would be far more appropriate
Never seen that happen before, maybe a combination of how much gas you use and how porous the concrete is I would assume?
