Tumbleweed wrote:

"Nick Maclaren" wrote in message
...
In article ,
david wrote:
Try using Formaldehyde.. horrible to use but will do the job.

Try a a stiff broom, some sharp sand, some water and possibly a squirt
of washing up liquid. It works a dream and isn't horrible to use.
Why does everyone think in terms of toxic chemicals?


I was thinking chemicals. No particular requirement for toxicity.

Physical abrasion by sharp sand isn't a bad solution though. It will work.
Chances are you may need to use a combination of methods to get the more
persistent bits off.

Regards,
Martin Brown