Mujitsu and Tairaku's Shakuhachi BBQ

Several previous threads on this topic can be found with the Search function here, including my own experience and treatment of moldy bores.  But I stumbled across this new suggestion on a recorder-making page:

Treating fungus

This is a serious problem, which must be treated without delay. It could have a disastrous effect on the sound and cause damage to the wood in the long run. It is sometimes be caused by drying in bad conditions but can have other origins. Some woods, like maple or box, are more prone to it than others, like pear. The block is often more resistant than the instrument itself. To cure this you can use a 10% solution of undecylinic acid (which can sometimes by found in pharmacies under the name of Mycodecyl 10%). Soak a "Q Tip" with this and rub the black spots in the windway until all the roughness has gone. The windway must be checked regularly afterwards to be sure that the fungus does not reappear. If it does, just repeat the treatment. It will finally go for good.

Bamboo isn't exactly wood, but maybe close enough that an unlacquered bore could benefit from this solution if the condition presents itself.

-Darren.