National Numismatic Certification: What does he/she do to the coins?

I know this Ebay seller (centsles) has been brought up before. What I'm wondering is, can anyone who knows more about this than I do explain what it is he or she might be doing to these coins to make them look so smooth? They very often have a look to the surfaces like maybe they are puttied or something? This 1839-C Quarter Eagle is a pretty good example. I've never seen a puttied coin so I have no experience with it - what else could be done to "achieve" that look (or destroy the coin I suppose would be a better description)? Just curious, wondering if anyone knows?

http://www.ebay.com/itm/1839-C-CLAS...213154?hash=item58d441f022:g:v-IAAOSwGotWlU33

 

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Crappy pictures can hide a lot of problems. I can only assume it's a problem coin of some sort -- cleaned, tooled, ex jewelry -- or it would be in a PCGS or NGC holder.

 

Yeah, I part of it could be just bad pictures - intentionally featureless.

 

The seller will put anything in his own slab. I contacted him a while back about a coin he had on ebay. The slab called the coin a rare variety but it was not the variety. They didn't care and sold the coin anyway.

 

Here's one of his coins in a pcgs ms64 slab:
http://www.ebay.com/itm/FRANCE-1815...626275?hash=item2108dd10e3:g:s8EAAOSwKtlWn9a5

His photos:


PCGS's photo of the same coin:


Clearly he's doing this to try to make the coin look better, but the photo is so wonky it just makes you wonder what's up.

 

39 c looks like a cleaned xf 45 to me. Still a rare coin but no au 58

 

PCGS' are obviously photos while his appear to be scans, and can help explain at least some of what you're seeing.