OP, do a search on this site regarding concrete overlays, as I recall there were many complaints about cracking, need for resealing, and loss of original color. If your driveway has already been painted or otherwise colored or sealed you may need to have the surface sand blasted to provide proper adhesion which if i recall correctly was a major problem that was reported. Hope this helps.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
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