[vash]

will a water pressure washer do the job? the dude will have to do the entire area to make it look uniform. and if it looks too sketchy, then there is a product on the market made by quikset, that is basically a super thin grout product that you can mix up in buckets and squeege across the serface to make it look good again. the product is designed to cover minor cracking, discoloration, etc. neat stuff, you can even dye it with its counterpart coloring agent and change the entire curb appeal of your home. just like all of our other instructions i would try a tiny area first.