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Prepare a solution by dissolving 60g of oxalic acid in 1 litre of water, apply to stain or rust and allow to work for 20-30 minutes. Always rinse thoroughly with clean water. For wood bleaching it is recommended to neutralize after treatment with a borax solution (3 tablespoons of borax dissolved in 1 litre of water).
When using on wood the wood must be free of all coatings, waxes & oils. It is necessary to use appropriate strippers and cleaners to remove coatings.
Make up a solution of oxalic acid and sugar. For each litre of syrrup solution you will need 500g of sugar, 500mls of warm water and 35g of oxalic acid dihydrate. Mix in a plastic or glass vessel but not in a metal container. Completely dissolve the oxalic acid in half of the water; then add the sugar and the balance of water. Mix continuously until all sugar has been dissolved and you are left with a thick syrup. This solution should be used within a week of making or store in the fridge until needed. Note: Always wear appropriate safety gear including gloves and goggles when handling oxalic acid, even when applying the finished solution. The oxalic acid and sugar solution is best applied by dribbling rather than spraying as it is considered to be a safer and more effective method.
PLEASE NOTE: This product is not for human or animal consumption.
Health & Safety:
EU Classification Symbol: Xn
Harmful if swallowed.
Causes severe skin burns and eye damage.
May cause respiratory irritation.
UN Hazard Class: 8
UN Pack Group: III