Touch up of holidays in a steel tank coating at the installation site should be done according to what?

The correct answer indicates that touch-up of holidays in a steel tank coating at the installation site should be performed according to the manufacturer's instructions. This approach ensures that the maintenance and repair of the coating adhere to the specific requirements and recommendations provided by the manufacturer, which are often based on extensive testing and expertise in how their specific materials and coatings perform in various conditions.

Following the manufacturer's instructions is vital because these instructions typically outline the correct procedures, environmental conditions, and materials needed for effective touch-up work. This guarantees that the integrity and protective qualities of the coating are maintained, ultimately enhancing the lifespan and reliability of the tank. Adherence to these guidelines minimizes the risk of future issues such as corrosion or failure of the coating, which could lead to hazardous situations.

While general painting standards, local building codes, and industry best practices might be relevant factors in other contexts, they may not address specific nuances related to the particular product being used. Therefore, relying on the manufacturer's guidelines provides the most tailored and effective assurance for the performance of the coating in the context of touch-ups.