NCS results with 1911 MPL

No, it isn't Thad. That is because not all "cleaning" is unacceptable. There are many coins in TPG slabs that have been cleaned. But the cleaning was light enough that the TPG found it acceptable. However, there are no coins that were harshly cleaned that were put in TPG slab.

Example - dipping is cleaning a coin, dipping is also the standard method, pretty much the only method of conservation. Dipping is perfectly acceptable. However, if you dip the coin for even 1 second too long then it is no longer acceptable. So you have a case here where conservation was both acceptable and unacceptable.

That is why the correct terms that should be used are - cleaning and harsh cleaning (or you may use improper instead of harsh if you prefer). THAT is the best way to avoid confusion. Otherwise you have people saying that dipping (conservation) is bad and other people saying that dipping (conservation) is good.

The proof of this are the multitude of post on any coin forum where you have people asking if what NCS does is not cleaning ? Or wanting to know how what NCS does is different from what they do in their own homes.

So since the word conservation can be both good and bad, it is much simpler and more accurate to differentiate by using the terms cleaning and harsh/improper cleaning.

Now I know you'll never agree with any of this. But I believe that most others will see the logic and accuracy in what I am saying.