When we talk about crystals around here ... A small amount of ferric oxide is added to a solution of oxalic acid, a commonly used cleaning and bleaching agent. Once the rust is dissolved ...

When we talk about crystals around here ... A small amount of ferric oxide is added to a solution of oxalic acid, a commonly used cleaning and bleaching agent. Once the rust is dissolved ...

When you're ready to start bleaching, begin by dissolving the oxalic acid crystals into hot water, according to the manufacturer's instructions. Use a paint brush to apply a generous amount of the ...