What matters in practice

Winter use adds stress. Vehicles bring in salt and slush, water collects near doors and drains, and exposed concrete can pass through wet and freezing conditions. Weak surface paste may scale away while existing chips and cracks collect more moisture and debris.

Pitting can also come from impact, corrosion around embedded metal, old coating removal or years of abrasion. Grinding exposes the actual limits of weak concrete, which is why a repair scope may become clearer after preparation begins.

A coating can protect a properly prepared and repaired surface, but it cannot stop structural movement or correct drainage by itself. The recommendation should separate cosmetic repair, functional detailing and conditions that need another trade or further investigation.