My project requires the contractor to apply a high performance coating to a canopy located at a cruise terminal. The specification states the steel which is hot-dipped galvanized shall be prepared in accordance to SSPC-SP2 (Hand Tool Cleaning)before the application of the primer. On the other hand, the supplier's preferred method of surface preparation is Abrasive Blast Cleaning which the contractor considers is a change order and will extend our project beyond what we would like. My question is Hand Tool Cleaning sufficient, with an inspector from a testing inspecting present during the coating process?
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