O-P
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O-P (Cruiser's Dictionary)
O
OXALIC ACID - An organic acid, good for removing rust stains. Can be obtained in powdered form from paint stores (it is used to bleach and clean raw timber). Will only dissolve completely in hot water.
- Rehydrate - 1 Tbsp. oxalic acid to 2 cups water. Works slowly, not as active as muriatic acid or phosphoric acid - safer on fiberglass. See "Stain Remover" for a more efficient way of using it. Store in non-metallic container.
- Precautions: Although the skin can be burned by the acid, this acid can also damage internal tissues through absorption through the skin without burning the skin (as does hydrofluoric acid). With no physical warning of the danger, I suggest that you use rubber gloves. We have used oxalic acid for years with no injuries of problems. Also be careful and don't inhale fumes or powder. Never boil the solution.
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