I once had my dust caps on a pair of (paper cone) speakers punched in, by a toddler, obviously. At the time I was dating a massage therapist and she had left some of her equipment at my place: a pneumatic "cupping" tool. I was able to select the perfectly matched size cup and suck the dent out. It worked! Some crease marks remained but looked a lot better than before.
https://www.amazon.com/Premium-Quality-Cupping-19-CUPPING/dp/B003KJC2F4
Hope this tip is useful!
Steve
https://www.amazon.com/Premium-Quality-Cupping-19-CUPPING/dp/B003KJC2F4
Hope this tip is useful!
Steve
