I've used WD40 to remove various stains. Works well on removing grease
from automotive work as well.. It may work for you, spray it on, scrub,
wash with soap.

-astria

Jerald Houk wrote:
> Lemon Juice should do the trick.
> It's the citrus acid in it that removes the stains.
> I used to work with a lot of mahogany that turned my hands purple.
> It works for me,
> Jerry
>
> "Clemens" > wrote in message
> ...
>
>>I was picking and halving walnuts, and my hands got dark brown from
>>tannin in walnut's shell.
>>
>>Please, is there any effective agent to remove dark stains off the
>>hands ?
>>
>>I tried with acetone, alcohol, lighter fuel, paint thiner, windex,
>>washing soap, laundry detergent, but it didn't help.
>>
>>Thank you.
>
>
>