From: "Phil Payne" 

"Frank Haber"  wrote in message
news:456f581f{at}w3.nls.net...
> In the bad old fifties here in the US, they used to sell a wide camel's
hair
> brush for LP records with Polonium radioactive strip attached, behind a
spiffy
> grille.You sent it in for refurbishment every couple of years (I forget
the
> half-life of PO, but it's of that magnitude).  Just like your
Mason-Pearson.

Also for de-dusting large format film negatives before enlarging.

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