Has that backside been wiped?

I often read about how an early circulated coin may have been "wiped" or have a "light old cleaning", but I never hear a good description of how to distinguish between these and an untampered-with example.
Most collectors can recognize a relatively harshly cleaned coin either by color, abrasions, or general appearance, but what are the telltale signs of of a wipe or light, subtle cleaning?
BC
Most collectors can recognize a relatively harshly cleaned coin either by color, abrasions, or general appearance, but what are the telltale signs of of a wipe or light, subtle cleaning?
BC
Dip Happens...

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Comments
Neil
Oh. Thanks for the reminder.
Doggedly collecting coins of the Central American Republic.
Visit the Society of US Pattern Collectors at USPatterns.com.
BC
Sometimes, you can't help yourself.
Doggedly collecting coins of the Central American Republic.
Visit the Society of US Pattern Collectors at USPatterns.com.
Thanks for the info so far. Any other tips?
BC