I'm the first to admit that, other than the most obvious "doctoring,"
I wouldn't be able to spot a previously cleaned or dipped coin. Be
that as it may, it's quite possible that someone, somewhere, has to be
the dog to take a leak on the hydrant. They're so enamoured by their
own sense of self-importance that they have to let everyone know who
they are. And to prove it, they have to write something in their
field of "expertise."
As an example, and going a little OT here, I'm a professional
handyman, and I've been painting as part of my job for the past 20+
years. I used to watch AOL's / Huffington Post's "How to" videos. I
quit when their "expert" showed how to clean a paint brush. His way
was fine, if I was willing to pay $20 a pop for a throw-away brush.
He, obviously wasn't an expert by any stretch of the imagination, and
many other professionals (handymen and painters both) said so. So
here's this young kid telling us how to do things we've been doing for
years, and telling us wrong. It's the same with coin collecting.
In a nutshell, knowledge is power, and I'm learning how to tell a
properly "conserved" coin as opposed to an "improperly cleaned" coin.
Jerry