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Date: Sun, 22 Sep 1996 20:49:30 -1000
From: Anthony Montgomery <amontgom@ha*.ed*>
To: Scott Cherf <cherf@ci*.co*>
cc: rfarb <rfarb@na*.ne*>, techdiver@terra.net
Subject: Re: flame polishing an acrylic dome port?
Scott,

	Try using acrylic sandpaper and polish that we use for aquariums.
We can take really bad scratches from our acrylic tanks.  Just becareful
not to polish it to much to distort the overall shape.  We start polishing
with 2400 grit, 3200 grit, 4000 grit, 6000 grit, 8000 grit, and then we 
use acrylic polish called novus 3,2, or 1.  Where 3 is similar in grit to
8000.  If you have fine white scratches left, then the novus 2 will buff
these out easily and it will look like new.  Novus 1 is called brillianze
and we use this daily to clean our acrylic tanks.
	You should be able to find some of this stuff in your local pet store,
or at least find out who to contact in your area.  You should be able to
buy a small aqaurium polishing kit that will include all of these grits,
but the polish will be separate.
Hope this helps!!!

Aloha
Tony


On Sun, 22 Sep 1996, Scott Cherf wrote:

> At 11:18 PM 9/22/96, rfarb wrote:
> >STOP!! Is the ding visible when you look through the viewfinder
> >underwater? More often than not water fills the defect and you cannot
> >detect the scratch on film. Rod
> 
> I don't know yet.  I noticed the ding when I unpacked the camera this
> morning after my last trip.  I can definitly see it through the view
> finder in air, when I cover the port with water I can't see it on the
> port.
> 
> I ran it into some coral a couple weeks ago in hawaii after the camera
> stoped working (I had clipped it off).  I went into a cave to look at some
> harlequin shrimp (while I was low on gas) and then pranged it on a coral
> head during the exit (I was low on gas and in a hurry to get out).
> 
> I'm afraid I have some coral in the lense, not just scratches.  After
> polishing it out I can still see some faint hexagonal marks through
> the viewfinder and I'm thinking about trying something more serious
> than crest, but I've been told that flame polishing is necessary after
> using real abrasives, hence the question.
> 
> After hearing the advice so far, I think I'll try shooting a cassette
> next week.  Maybe it's just a deep scratch.  If the video doesn't come
> out it's not a big deal anyway.
> 
> Thanks,
> Scott.
> 
> 
> --
> Send mail for the `techdiver' mailing list to `techdiver@terra.net'.
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> 

                ANTHONY MONTGOMERY
Marine Option Program           Waikiki Aquarium
1000 Pope Road  MSB #203        2777 Kalakaua Ave
Honolulu, Hawaii  96822         Honolulu, Hawaii   96815
Fax: (808) 956-2417             Fax: (808) 923-1771
Phone:  (808) 956-6000          Phone: (808) 923-9741

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