Nigel Goodwin wrote:

> For doing repair work on surface mount boards we use an aerosol
> solvent with an adapter that sprays the solvent through the middle of
> a stiff bristled brush, you then just pull the trigger on the brush
> assembly and use the brush to clean the board.

  Sounds similar to my metho and toothbrush.

  Seems to me that it is important the solvent be applied in a number of
bursts, and must drip off the board (onto paper or whatever) rather than
dry, otherwise it will re-deposit the very material as it dries.
--
  Cheers,
        Paul B.