we've just had a sculpture returned by its new owners with a chewing sound and a sawdust pile that weren't components of the original vision. i think the insect is some kind of boring beetle from the sound. we have pine sar beetles in the yard.
this is a detail of the piece. you can see the bark of the balsam fir.
the challenge is the clients would like to keep the bark on as it was made. (it's a nice contrast.) any ideas on how to evict or otherwise deal with the insects? i've considered spraying poison in the hole, keeping it in the sauna for a long time at 100degrees, or submerging it in water. thoughts on whether any of these approaches are likely to work? how long can these guys hold their breath? are they as tough as a finnish grandmother?