Specifications include, but are not limited to: 4.1.1 Surface clean to remove dust, dirt, and debris. 4.1.2 Remove or reduce active corrosion. 4.1.3 Locally re-patinate to match and blend with existing patina. 4.1.4Fill casting flaw/voids with pigmented wax to prevent water infiltration. 4.1.5 Apply a protective hot wax coat or lacquer containing a corrosion inhibitor.