Well im putting speakers in my boat (eclipse SP8964) and they have the polypropylene cone and santoprene surround. Now ive choosen these over amrine speakers because marine speakers sound liek crap. SO my question is, can i spray them with a fabric/carpet protector? I know this sounds weird but it is a very thin application and wont peel, crack, or anything, and isnt hard at all. so the santoprene surround can move freely.
If they're exposed to water or extreme humidity, be prepared to replace them every 6 months or so, maybe longer if you're lucky. The home speakers I put on my boat have been fine for about 4 years now, but they're also in a cabin with de-humidifiers...As for spraying them with waterproofing, I can't say whether or not that will corrode the surround. Look on the package and see what the active agent is.