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Equipment Discussions >> Classic Telescopes

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Compressorguy
Carpal Tunnel
*****

Reged: 03/14/09

Loc: Clayton, NC
Re: Elli Buk Cave 10" Cassegrain [Re: PiSigma]
      #5842024 - 05/05/13 04:56 PM

Really!........."Astronomical" themed ziploc bags. Very professional. You cant teach that.

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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: Compressorguy]
      #5842158 - 05/05/13 06:01 PM

Quote:

Really!........."Astronomical" themed ziploc bags. Very professional. You cant teach that.




OH, I hoped nobody saw that.


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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842316 - 05/05/13 07:43 PM Attachment (38 downloads)

The telescope back was pretty pitted and oxidized (see earlier photos). I did some research on polishing aluminum on the internet and discovered a company called Zephyr. They have polishing compounds, polishing wheels, and a system to get a mirror finish out of aluminum. Here is what I bought.

The bars are the polishing compound. Different degrees of cutting and polishing. Brown is the highest grit then white and finally rouge red. The polishing wheels also have degrees of roughness and ability to polish. Finally the buffing wheel is used last to get the final finish.

Edited by turk123 (05/05/13 07:44 PM)


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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842319 - 05/05/13 07:47 PM Attachment (43 downloads)

I set up a rig outside. The last polishing job I did brought the wrath of the lady of the house down on me for spraying the basement with compound. She was right, and I didn't clean it up. So I was banished to the outdoors. The tarp is their to protect me from further wrath from damaging any plants or brickwork.

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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842324 - 05/05/13 07:50 PM Attachment (39 downloads)

The back is a smooth aluminum. It is pitted and not really that even. I figured it could get a good clean and polish to make it look a little better. I won't bore you with the entire routine, but i gradually went through all the degrees of polish and polishing wheels and did a final buffing.

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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842327 - 05/05/13 07:51 PM Attachment (29 downloads)

I then took it inside and used Mothers on it to get rid of any further oxidation. I also rinsed it in soap and water 2 or 3 times to get the film off.

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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842335 - 05/05/13 07:56 PM Attachment (40 downloads)

Finally I used several coats of Fleet wax to bring out the final shine. No, thats not the mirror. It's not perfect with the pits and imperfection, but it looks so much better than before. I wonder if Mr. Cave delivered this telescope with shinny aluminum. Probably not. Probably more of a satin shine. I am debating whether to polish the rings instead of painting them in instrument grey. Might add a nice touch to her. I have a picture of her with polished rings, so they did deliver some this way.

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rfic1
sage
*****

Reged: 10/25/05

Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842376 - 05/05/13 08:18 PM

Looks great but just be aware that mirror like surface is going to reflect any outside stray light right back at you.
Back in 1975 I was bothered by reflections off my 6" Cave white fiberglass tube. So I painted it flat black. Now as a collectable I'm sure the painted tube detracts from it's value but it did solve the reflection problem.
Cant wait to see the rest of your restoration.


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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: rfic1]
      #5842444 - 05/05/13 09:02 PM Attachment (41 downloads)

Never thought about the reflection. Well, I will just have to wait and see.

In the back you can see the mount poking it's head up. Just behind my "also" new pride and joy (and I don't mean the car, it's my wife's.)


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Steve_M_M
Carpal Tunnel
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Reged: 06/09/04

Loc: Moorpark, CA
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5842445 - 05/05/13 09:02 PM

Quote:

The telescope back was pretty pitted and oxidized (see earlier photos). I did some research on polishing aluminum on the internet and discovered a company called Zephyr. They have polishing compounds, polishing wheels, and a system to get a mirror finish out of aluminum. Here is what I bought.

The bars are the polishing compound. Different degrees of cutting and polishing. Brown is the highest grit then white and finally rouge red. The polishing wheels also have degrees of roughness and ability to polish. Finally the buffing wheel is used last to get the final finish.




Hi Tom,

Funny. We were both out working on our scopes today with the same stuff. Clint taught me about the brown, white, and red rouges with the buffer a couple years ago. Works great! That said, my wrists and arms are killing me after several hours work. I can barely hold a diet coke I hope yours are doing better.


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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: Steve_M_M]
      #5842459 - 05/05/13 09:09 PM

Hi Steve

I'm taking mine a bit slower than you, but that said, my wrist do hurt! Yours is looking very nice. The color on the tube is gorgeous! Who knew what was behind the dirt.

I just removed the rear ring and tested a new paint remover Datapanic suggested: aircraft remover. You can get it at autozone. It is fantastic! took off all the paint in just one coat. Suggest doing this outside though, the fumes are a bit much. I hope I don't bring any planes down.

Edited by turk123 (05/06/13 08:08 AM)


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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5844479 - 05/06/13 09:28 PM Attachment (35 downloads)

OK, the main tube rings are next. I used Aircraft remover on the aluminum rings. Scrap, add more remover, scrap, add light coat, use wire brush to get all the paint out of the fine machining lathe marks.

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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5844482 - 05/06/13 09:29 PM Attachment (31 downloads)

After removing my watch before I destroyed it, I completely washed every thing in soap and water.

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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5844484 - 05/06/13 09:32 PM Attachment (32 downloads)

I polished it a bit with Mothers just to see what they could look like. I will use the polishing compound and wheels (outside) for a final finish. What does everyone think about polished rings instead of industrial grey rings?

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turk123
Pooh-Bah
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Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5844487 - 05/06/13 09:34 PM Attachment (29 downloads)

Sitting in the corner, the tube is calling me to work on it. I think I will try the light wet sand with 2000 grit to get a more uniform color, but I have to think about it first. Last time I sanded a tube, the fiberglass web started showing through. It will have to wait till tomorrow anyway.

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davidmcgo
Pooh-Bah
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Reged: 10/09/04

Loc: San Diego, CA
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5844506 - 05/06/13 09:55 PM

Might just start with rubbing compound on cheesecloth and see what you get before sanding.

Great work so far!

Dave


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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: davidmcgo]
      #5844531 - 05/06/13 10:08 PM

Quote:

Might just start with rubbing compound on cheesecloth and see what you get before sanding.

Great work so far!

Dave




That's a great idea! I'll try it.

Thanks for the compliment.


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mustgobigger
Postmaster
*****

Reged: 06/12/07

Loc: Michigan
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5844918 - 05/07/13 05:09 AM Attachment (36 downloads)

thats what i do....finishing compound with a wheel in a small
area...to see results.
its nice to get out and do the work the guys in warmer climates
can do all year long.
thats why i just redid my basement a month ago.
no more idle winters.
great job on the cave....glad someone here got it.


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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Elli Buk Cave 10" Cassegrain [Re: mustgobigger]
      #5845028 - 05/07/13 07:33 AM

Wow! Great shop! Absolutely perfect for the winter. I am so glad you're not the kind of guy who draws outlines on the pegboard around the tools! Collecting telescope can be a form of OCD. You can relax. Clearly this proves you normal.

I feel fortunate for getting the Cass cave. Thanks


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starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Elli Buk Cave 10" Cassegrain [Re: turk123]
      #5845070 - 05/07/13 08:14 AM

Brian
I was looking at that round Craftsman drum sander at sears the other day. Looks like it has a lot of neat gadgets. How well does it work?


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