PicDude <picdude <at> narwani.net> writes:

> 
> 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?
> 

Oxalic acid works, but it is an acid, even if not very strong.  If you can get 
your hands on EDTA (ehtylene-diamine tetra-acetic acid) it should work better.

Stains on hard surfaces, e.g. kitchen counter-top, are hard to remove using 
this stuff, MagicEraser (I think it is sold as Mr. Magic in Walmart) works 
great.

Sergey Dryga
http://beaglerobotics.com



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