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Elli Buk Cave 10" Cassegrain

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#26 turk123

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Posted 05 May 2013 - 06:51 PM

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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#27 turk123

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Posted 05 May 2013 - 06:56 PM

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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#28 rfic1

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Posted 05 May 2013 - 07:18 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.

#29 turk123

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Posted 05 May 2013 - 08:02 PM

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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#30 Steve_M_M

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Posted 05 May 2013 - 08:02 PM

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.

#31 turk123

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Posted 05 May 2013 - 08:09 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.

#32 turk123

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Posted 06 May 2013 - 08:28 PM

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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#33 turk123

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Posted 06 May 2013 - 08:29 PM

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

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#34 turk123

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Posted 06 May 2013 - 08:32 PM

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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#35 turk123

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Posted 06 May 2013 - 08:34 PM

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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#36 davidmcgo

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Posted 06 May 2013 - 08:55 PM

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

Great work so far!

Dave

#37 turk123

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Posted 06 May 2013 - 09:08 PM

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.

#38 mustgobigger

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Posted 07 May 2013 - 04:09 AM

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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#39 turk123

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Posted 07 May 2013 - 06:33 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

#40 starman876

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Posted 07 May 2013 - 07:14 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?

#41 tim53

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Posted 07 May 2013 - 08:52 AM

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.


I recognize the workbenches, because last weekend my son and I did the same thing for his guitar shop - put two together just like that!

-Tim.

#42 mustgobigger

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Posted 07 May 2013 - 07:47 PM

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#43 Herr Ointment

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Posted 07 May 2013 - 07:52 PM

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#44 mustgobigger

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Posted 07 May 2013 - 07:57 PM

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#45 mustgobigger

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Posted 07 May 2013 - 08:04 PM

tom ill move these so i dont clog up your cave post.

#46 turk123

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Posted 07 May 2013 - 09:18 PM

Back to the scope.

I thought about the rubbing compound and cheese cloth and then it kind of hit me. I've owned 2 sailboats in my life and these tubes are nothing but fiberglass and gelcoat. Same as a sailboat. So I decided to use what I am use too. 3M makes a product called Finese-it II. It is a very light rubbing compound mainly used to get rid of swirl marks in paint finish. It is used almost exclusively on gelcoat. You have to use a buffer, preferably an orbital buffer as the compound is so light that hand polishing would take forever.

After the buffing I used another sailboat item, fleet wax. I used the buffer to shine it up. What do you think? I think it looks great especially compared to the original pictures of this scope. I was worried then, not anymore!

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#47 Datapanic

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Posted 07 May 2013 - 09:23 PM

Looks nice! How did it do on the spider-cracks? It seems to me that with a good, clean polish that they don't look as bad afterwards.

#48 turk123

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Posted 07 May 2013 - 09:29 PM

Looks nice! How did it do on the spider-cracks? It seems to me that with a good, clean polish that they don't look as bad afterwards.


The only spider cracks on the tube are around the finder ring holes. These are deep enough to have a black color to them. The wax did not cover. Fortunately, most of them will be covered by the finder ring mounts.

#49 Steve_M_M

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Posted 07 May 2013 - 09:30 PM

That looks awesome. It always amazes me how well classic scopes clean up with some TLC. Very nice job!

#50 turk123

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Posted 07 May 2013 - 09:42 PM

That looks awesome. It always amazes me how well classic scopes clean up with some TLC. Very nice job!


Thanks Steve.

The finesse-it compound is also very forgiving. You do not have to worry about "burning" a hole through the finish it is so light like I did on a previous scope with 2000 grit sandpaper. Again, you must use a buffer with this stuff.


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