Resurfacing can make sense when the slab is mostly sound and the damage is cosmetic. It does not solve deep settlement, major cracking, drainage failure, or a base that moves every season.
Concrete driveway removal is usually the better path when slabs are heaved, the apron has dropped, the slope sends water toward the garage, or weeds are growing through wide cracks.
A good estimator should tell you when not to spend money on demolition. But when the base is gone, a new surface over bad concrete is just a nicer-looking problem.
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