Oh, I'll bet you can find wood bleach. It will be in the same place as steel wool and stripper for refinishing furniture. I also recently found out it's used for killing mites in beehives (I learned that on a UK site).
Just look for Oxalic Acid.
eta: http://www.agwoodcare.co.uk/show_product.php?id=106 Source for oxalic acid in the UK.
eta: OH, you meant the penetrating catalyst? That's more a category name than a brand name. There's something else equivalent, I'm sure. Or you can get it here: http://www.blasterchemical.com/store...m?Product_ID=1
Have fun!
Karen



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