So I finally did it -- I was moving some stuff in storage last weekend and 
apparently one box had some ferric chloride in a container, which spilled in 
the trunk and folded-down rear seat of a minivan.

Google found me some chemicals which are specifically ferric chloride stain 
remivers, but from suppliers in the UK.  The MSDS says that it's 100% oxalic 
acid, which I can get from other sources, such as www.chemistrystore.com .

Anyone here know if it really works?  Can I just get oxalic acid from another 
source and expect it to magically remove the ferric chloride stains?  There 
is a little bit of the stains visible at the top of the rear seat, and 
removing those are my priority.  Or are there any other chemicals that can 
clean this off?

Cheers,
-Neil.
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