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My old boss told me to never use isopropyl on mirror foam, and he was right
He said it would dry out the foam and make it crumble in a few months. I saw a tech in Seattle try it on a Nikon F3 mirror bumper last year, and sure enough, the foam turned to dust by spring. What do you all use to clean that area without causing damage?
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green.mason7mo ago
Yeah, that "turned to dust" thing is real. My buddy used a tiny bit of lighter fluid on his Pentax foam and it just... fell apart a few months later.
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matthewbarnes7mo ago
Man, that's brutal. I learned the hard way too, tried cleaning an old camera seal with rubbing alcohol. Thought I was being so careful, just a little on a q-tip. Fast forward two weeks and the whole mirror box foam crumbled like stale bread. Felt like such a genius move at the time. Now I just leave the sticky foam alone unless I'm doing a full replacement. Some lessons you only get once.
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taylor_moore6mo ago
But like, is it really that bad? I've used a tiny bit of alcohol on foam before and it was fine. Maybe some types just give up faster.
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