Abrasion resistance refers to a coating’s resistance to wear due to abrasion or impact, allowing the system to continue to give complete protection to the substrate. The best resin coating is one that combines hardness and flexibility. An impact may fracture the system down to the substrate if a coating isn’t tough enough.
However, the harder you make a coating, the more brittle it becomes, thus hardness must be kept in check with flexibility. Abrasion occurs when two rough surfaces come into contact; therefore, a system’s smoothness is crucial.