Keith a very MILD mix of costic soda. Do not breath in the fumes do it in the open air. Do ware gloves and do not leave it on long. I had some acid like substance I used on my MGC wire wheels bot its gone off I've just been checking it. You may be able to get some it's like wonder wheels but stronger, professional valeters use it. John
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[SIGPIC][/SIGPIC]Rover 75, dignity, quality, charm.
"Eliza ... Where the devil are my slippers?"
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