I have a 4 yr old concrete driveway that has pock mark and some eroded spots. The eroision and pock marking seem to have stopped and the remaining concrete seems solid. Has anyone used any of the products available for resurfacing. I posted here about problem last year and was told about a metod of repair that used pure Portland cement worked into damaged areas. I tried this on a couple of small areas. Apparantly I did something wrong because it did not work. The repair looked good and seemed like it bonded well, but itcame out after about a month. Any advice or suggestions will be greatly appreciated.