The dust cover challenge

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Japi Roelofs
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The dust cover challenge

Post by Japi Roelofs » 15 Aug 2015 21:29

OK, so today I picked up this Erres 5777 (= Philips 777) turntable. It was super cheap, it worked, and it was in pretty good condition. All it needs is a new stylus.
Although it didn't have any cracks or tears, the dust cover however was a disaster. One of the worst I've ever seen. Deep scratches all over it.

This is what it looked like:

https://i443.photobucket.com/albums/qq1 ... r2pkzo.jpg


https://i443.photobucket.com/albums/qq1 ... haprbc.jpg

To get this up to snuff, I figured I'd have to grind off the top layer. So I got out the sander....

https://i443.photobucket.com/albums/qq1 ... 8imupd.jpg

I used 600 grit sandpaper, a bit rough but the scratches were pretty deep.
After the first sanding:

https://i443.photobucket.com/albums/qq1 ... ghd2d3.jpg

Ouch! That looks rough. Using the sander was clearly a mistake. The deep scratches were gone, but the sander generates heat, and plastic particles formed little dots on the sandpaper, causing swirls in the cover. Hmmm...
So I have to get rid of these swirls. Hand sanding with more 600 grit:

https://i443.photobucket.com/albums/qq1 ... ymgrvl.jpg

A little better. Now the wet sanding. Starting off with 1000 grit:

https://i443.photobucket.com/albums/qq1 ... yjw1xs.jpg

Still pretty much opaque, but a lot smoother already. Continue with 1500 grit. Finish with 2000 grit.

https://i443.photobucket.com/albums/qq1 ... xl5mqj.jpg

That's more like it, we can almost see through it again!
Time to start buffing. I picked up this buffer a while ago, I use it in combination with 'Commandant' rubbing compound.

https://i443.photobucket.com/albums/qq1 ... kt2a9r.jpg

https://i443.photobucket.com/albums/qq1 ... muw4tk.jpg

It took me about 15 minutes to buff the entire surface. Doing this by hand, it would take several hours!

https://i443.photobucket.com/albums/qq1 ... ovtoah.jpg

Yep, that worked. The buffer also leaves a bit of swirl, so it's time for the finishing touch. Magic polish! Yeah, that's what we need... Apply liberally, and rub it on, with a soft cloth.

https://i443.photobucket.com/albums/qq1 ... wlbezn.jpg

And we're done! This last picture doesn't do it justice, it was getting dark outside and the lighting inside is insufficient.
Is it perfect? No, not by any means. You can still see some of the deepest scratches, and some swirling, but only when you look at it from a certain angle.
But it's nice and shiny, and pretty clear. Total time about an hour and a half.

https://i443.photobucket.com/albums/qq1 ... 3pgngv.jpg

I can't say it's my favourite job, but it does give satisfaction to be able to look through it again!

cats squirrel
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Re: The dust cover challenge

Post by cats squirrel » 15 Aug 2015 22:05

top job, Japi. 8)

Kurt45
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Re: The dust cover challenge

Post by Kurt45 » 15 Aug 2015 23:33

Impressive!

vinyl master
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Re: The dust cover challenge

Post by vinyl master » 16 Aug 2015 01:49

I'm going to have to remember these tips, Japi...Excellent work! =D>

BillWojo
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Re: The dust cover challenge

Post by BillWojo » 16 Aug 2015 03:45

Wow, that was a mess and it looks great again. I like the look of the 3 headed buffer. Where did you get that?

BillWojo

Japi Roelofs
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Re: The dust cover challenge

Post by Japi Roelofs » 16 Aug 2015 13:17

BillWojo wrote:I like the look of the 3 headed buffer. Where did you get that?
Well I got it in a small store where they sell factory overstock and assorted second hand tools. It was new in the box and cost me € 15.

Brand: Toledo, model: TDS-3DK
Also sold under the 'FERM' brand name I think, probably German made.
It has velcro attachments for sandpaper discs, but it also came with a bunch of thick felt discs, which I use for the buffing.

At first I was unsure of its capabilities, as the individual heads are flexible, and it can 'stagger' a bit when uneven pressure is applied. But I just had to get the hang of it, and it works fine now, and it sure saves me a lot of time!

Van_Isle
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Re: The dust cover challenge

Post by Van_Isle » 16 Aug 2015 19:24

For those N.A. based enthusiasts, here's my method:

1) Clean the dustcover to remove dirt / tape residue, etc.
2) hand wet-sand, with a rubber 3M auto-body sanding block and using wet/dry sandpaper. I go from 600 up to 2000 grit, as required depending on what issues I have to start with.
2) Novus plastic cleaning / polish system (Novus 1, 2, 3). Maguiare's has a system as well which works well, except for the 'all-in-one' PlastX, which I wasn't impressed with.
3) From a clearance outlet I acquired a 6-inch hand orbital buffer for about $18. Various bonnets purchased separately.
4) For the final 'buff' a 50/50 mixture of Lemon Pledge and Windex glass cleaner. Careful when you're done as the dustcover will be very slippery!

Couple notes:
1) Without major scratches, the Novus does a good job just by itself.
2) You may read posts that recommend using Brasso. Be aware that some time ago, in N.A. they changed the formula for Brasso. The new stuff will ruin your dust covers. Don't know if the European version is still ok ... but I'd just steer clear of it as you never known when they will change.

Japi Roelofs
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Re: The dust cover challenge

Post by Japi Roelofs » 25 Nov 2015 12:25

Van_Isle wrote:4) For the final 'buff' a 50/50 mixture of Lemon Pledge and Windex glass cleaner. Careful when you're done as the dustcover will be very slippery!
Hey Van_Isle, just wondering, how did you come up with this formula, and how (well) does it work?

mrtechnologist2u
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Re: The dust cover challenge

Post by mrtechnologist2u » 25 Nov 2015 12:55

Excelent restoration job!

My question is how to remove tape residue! They seem to come in 2 Flavors: masking tape or Packing tape. What solvent can you use that is safe for the acrylic dust cover but remove the residue?

Japi Roelofs
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Re: The dust cover challenge

Post by Japi Roelofs » 25 Nov 2015 15:46

mrtechnologist2u wrote:My question is how to remove tape residue!
I use white spirit or lighter fluid to soften and remove the glue from the tape. I guess it might harm the plastic in the long run, so do it as fast as you can, and immediately clean it off with warm soapy water. And then the buffing begins :D

Acetone is probably the stuff to avoid, as it's very aggressive.

gridleakrick
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Re: The dust cover challenge

Post by gridleakrick » 26 Nov 2015 14:36

Your initial power sander appears to be a straight line type sander. They are meant more for woodworking than anything else. Next time try a random orbital sander. They won't cause the problems you experienced.
Rick

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