Hi

Im in the middle of replacing a tannoycheviot surround - (HPD315/8 spkr with Rolloff and energy knobs serial 512818). I know they lived unused for 25 years in a dry warm room but after a year of occaisional use this one started farting on specific bass frequencies and on examination the foam surround was flapping.

I bought a pair or surrounds online and know Ive got the speaker out and the foam off. Ive cleaned the metal struts that hold the surround in place and most of the old foam
off theunderside of the cone but the chassis still has a green coloured residue that is hard to remove especially as i risk damaging the cone. Is there any advantage in cleaning this off now ive removed all the loose bits of foam as i will just be gluing the new surround on top of it before replacing the struts?

thanks in advance

mick