I saw a video from Dynaudio and they did show the guy was able to "suck out" the dent with his mouth. But that was a soft dome tweeter. I think B&W uses hard dome tweeter so I am not sure "sucking it out" with you mouth is possible since you will need much stronger vacuum force.
Hm ... would it work using a breast pump?
Hm ... would it work using a breast pump?