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-   -   platter black spots won't come off (http://www.diyaudio.com/forums/analogue-source/215782-platter-black-spots-wont-come-off.html)

william13 7th July 2012 10:07 PM

platter black spots won't come off
 
Dual cs5000 plater: don't know if its aluminum or zinc or both: does not ring when tapped. shinny areas have black carbon like spots that noxon will not take off. Hear simachrome good but any other ideas?

vacuphile 7th July 2012 11:01 PM

Enjoy patina & don't worry.

user510 8th July 2012 07:52 PM

Quote:

Originally Posted by william13 (Post 3084889)
Dual cs5000 plater: don't know if its aluminum or zinc or both: does not ring when tapped. shinny areas have black carbon like spots that noxon will not take off. Hear simachrome good but any other ideas?

Does the spot increase in size the more you polish? If so beware that the spot is more than just a surface stain.:eek:
If spot size does not appear to change with extensive polish, then you might want to try another polish.

For my zinc Thorens platters I've been using Mother's Mag Wheel polish with excellent results.

-Steve

william13 8th July 2012 11:59 PM

I heard that Mother's Mag is great but on the bottle/can it said to not use on anodized aluminum and I think the Dual platter is just that (not sure however). The spot got a lot lighter but only by 75%

Thanks
Bill

moray james 9th July 2012 05:06 AM

you might try NEVR Dull, I can make a Thoren's platter look like chrome with this stuff, best regards Moray James.

http://www.nevrdull.com/

william13 9th July 2012 12:20 PM

Did it take off black corosion spots?

william13 12th July 2012 04:33 PM

I have used almost every product: stain persists
 
I can not get these black spots out. The chrome plater or aluminum or zinc (I do not know) really holds on to these blemishes. I have tried magic eraser, simichrome, never dull, etc etc. I believe this is mild corrosion with some mild pitting. The rim surface is grooved (purposely) like a vinyl record. I believe I have to sand to get the corrosion off which means I have to remove the nice grooved surface. I am not an expert sander and would appreciate advice on how to sand a platter.

harwoodspark 12th July 2012 10:31 PM

I wouldn't bother doing any more to it. Etch prime it and paint it. If you can't do it yourself any good auto paint shop can do it.


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