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- From: tomy@carson.u.washington.edu (Thomas Tucker)
- Newsgroups: rec.autos.tech,rec.autos
- Subject: Re: remove inside rear-view mirror - HOW?
- Message-ID: <1992Nov17.092540.6242@u.washington.edu>
- Date: 17 Nov 92 09:25:40 GMT
- References: <1992Nov17.002321.17443@wvus.org> <1ea2cjINNodk@usenet.INS.CWRU.Edu>
- Sender: news@u.washington.edu (USENET News System)
- Organization: University of Washington
- Lines: 45
-
- aas7@po.CWRU.Edu (Andrew A. Spencer) writes:
-
-
- >In a previous article, pete@wvus.org (Pete Gregory) says:
-
- >>Hi - I just bought a factory replacement rear-view mirror for my 1969
- >>Porsche - the old mirror is broken but still glued to the windshield
- >>with whatever epoxy they used 23 years ago.
- >>
- >>How do I remove the old mirror without breaking the windshield? Is
- >>there something that will dissolve the old epoxy but not the glass?
- >>
- >>Thanks...
-
- >super glue remover, maybe..dunno..never tried it..just thought i'd offer.
- >or maybe fingernail polish remover..never tried that either...
- >good luck
- >DREW
- >--
- Here's my ill-informed but likely useful advice:
-
- Try chromic acid. A solution of potassium dichromate in
- 18M sulfuric acid (which yields chromic acid) works wonders for
- removing organic materials from glass. There's just one major
- drawback: this about as serious as oxidizing acids get.
-
- Use gloves, goggles, as much H2O as possible when you finish,
- and, if possible, a vent hood while you attack the problem.
-
- I've never tried this; it may not work. But if it does, I'd love
- to hear about it, and it'd make a great story to tell your chemically
- minded pals, if you survive.
-
- BTW, super glue remover and nail polish remover tend to be the same
- sort of thing: a low-molecular weight ketone, usually acetone, or
- acetone diluted with some other solvent. I don't think this will
- work, unless the epoxy resin hasn't fully cured yet. But, by all
- means, please try the organic solvent route before you go for the
- big guns.
-
- Let us know what happens.
-
- -tomy.
- Tom Tucker
- tomy@maxwell.ee.washington.edu
-