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| − | =Miscellaneous=
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| − | ==Flooded vehicles==
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| − | Flooded vehicles can be very difficult to handle, as there can be rust in any and all places. They are best avoided, unless it's the car that you really want.
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| − | ==What's galvanization?==
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| − | ''(needs confirmation)''
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| − | "Galvanizing" typically refers to hot-dip galvanizing, a process by which iron or steel is coated with a thin layer of zinc, by dipping it in a molten bath of zinc. Galvanized steel can be welded. It's been used for more than 150 years.
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| − | Zinc oxidizes when exposed to air, forming zinc oxide, which then reacts with water molecules in the air to form zinc hydroxide, which then reacts with carbon dioxide in the air to form zinc carbonate. Zinc carbonate (the final "galvanizing" layer), is a thin but very tough protective layer. It also acts as a "sacrificial anode". It will corrode before the steel it is protecting.
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| − | Many modern automotive body panels are galvanized.
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| − | You can buy cold galvanizing spray (list examples here)
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| − | ==Hydrogen embrittlement==
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| − | All acids contribute hydrogen to metal. This causes hydrogen embrittlement, which weakens the metal. Untrue: you can "bake" the hydrogen out at 400 degrees F, after exposing a metal to acid.
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| − | ==Fiberglass resin patches==
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| − | One technique that has been recommended is to grind/clean the rust, tape the underside of the panel to be patched, and then fill the holes with fiberglass resin, then paint and undercoat. This trick is not really a good idea -- when the body flexes, there will be cracks in the fiberglass pieces. Metal also expands at different rates than fiberglass, causing cracks to form, allowing more rust to form in these cracks.
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| − | ==Do metal etches leave coating?==
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| − | Follow up on metal etches like DuPont's Metal Etch or POR's Metal Ready leaving a phosphoric acid coating on the metal that will prevent flash rusting while storing.
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| − | ==How to remove rust protection==
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| − | How to remove old rust protection finishes? Or undercoating?
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| − | *Wire wheel
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| − | *Brake cleaner
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| − | *Kerosene
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| − | *Heat gun
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| − | *EZ-Off oven cleaner
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| − | *Mineral spirits
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| − | *Freeze with dry ice, then chisel out
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| − | *Wallpaper steamer
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| − | ==What about riveting in patch panels?==
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| − | Very low-end solution, like fiberglass patching metal. Panel adhesives are a better choice when you can't weld.
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| | =Resource dump= | | =Resource dump= |
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