Rust Converter and Patching Holes
With the plywood up, we were able to properly asses the condition of the metal frame and were happy to find there weren't any gaping holes or excessive cancer spots. After sanding the larger rusted spots with a wire brush attachment for the angle grinder, we applied a few coats of rust converter to the entire floor of the bus. Rust converter is a chemical solution that can be applied directly to an iron or iron alloy surface to convert iron oxides (rust) into a protective chemical barrier. Once dry, we used wall patch mesh (with adhesive backing) and caulk to patch all the bolt and nail holes.
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