California Fencing Contractor (C-13) License Practice Exam 2026 - Free Fencing Contractor License Practice Questions and Study Guide

Repairing damaged galvanized coating requires applying zinc-rich coating to clean metal with a method that builds a proper, continuous film. After removing the cracked coating, you’ve exposed bare zinc that needs to be rebuilt with zinc-rich material so the protective, sacrificial layer can continue to protect the metal. Brushing or rolling on zinc-rich coating ensures the coating adheres well, reaches the necessary film thickness, and can be worked into edges and crevices. Spraying zinc-rich paint is not appropriate here because it can cause uneven coverage, insufficient zinc deposition, and overspray, leaving areas inadequately protected. So the contractor should have applied the zinc-rich coating by brush or roller rather than spray, following the recommended film thickness and cure guidelines.