Greetings to all,

I found a sweet old oak Gerstner tool box at an estate sale. It had been in a barn for years and needs to be refinished. The top is covered with black stains caused by iron and moisture reacting with the tannins in the oak. I'm told that Oxalic Acid will take the stains out. Anyone have an idea where I might find this stuff?

Thanks in advance,

- Rob