Picked up some LS70's last night and they need some help. One of them looks fine, but the other has definitely seen better days. All pegs for the grill snapped off and he used some sort of adhesive to keep it on. Its kind of like the gunk used in car doors to keep the plastic lining on. It doesn't permanently dry and can be heated up to loosen up some.
I've already scraped off most of the excess with a flat piece of plastic. What I need now is something to get the rest off. Is there some sort of chemical that can be used that won't damage the finish on the speaker in the process?