To Dip Or Not To Dip

So is "MS 70 Industrial Strength Coin Brightener" a coin dip? I was told by a local, respected dealer that this is something he uses and is non-detectable.

Some seem to try to equalize "Professional Conservation" and "dipping" they are very different IMO.....one side knows what they are doing....the other does not.....again I refer to the 1936 Dot Dime that was Dipped by a "Professional Conservator"....went up 2 Grades and the dipper told the world he did it.............yup...."Blast White" now....but he knew what he was doing to remove the "Ugly" Toning.

Wow, so if it is a book, it must be true. I would rather trust my chemistry text book from high school. Frankly, as nickelsguy mentions above, you have to know what you are doing. Basically, this is a substitution chemical reaction with the oxide coating on the surface of the coin. Technically speaking, it is cleaning. But so is picking out the gunk from letters of the legend with a hawthorn pick. Although "cleaning" is a nasty word to be associated with numismatics, it can be done properly. Some coins are not worth dipping, depending on how it was toned (artificially or otherwise), you also should know what solution you are dipping the coin in. However, this is not a black box approach. Household 'silver dip' is much too strong to be dipping coins, unless you are studying varieties in detail, using junk coins. I often cut the common silver dip solution down to about 50% with distilled water, and only dip coins if I think it will vastly "save" the coin from a numismatic perspective.

I sometimes give coins a long ultrasonic bath, with distilled water... do you consider that cleaning? (You don't have to answer that, I am using it as an example to illustrate a point!).

Here's a coin I might consider dipping, but first I'd like everyones grade. Thanks in advance.(It is in an ANACS holder.

It's a beauty,don't dip it
AU55 minimum
Hard to discern toning from wear in the photo

Trying to grade a picture of a coin with toning is very difficult. It first looks like an EF45. But having toned coins myself, I know how the different shades of toning can look like wear. The ribbon on the neck looks worn, but I'll guess that its toning because the reverse looks good.

final answer...AU55(maybe 58)

It is an ANACS AU58. I have owned it a few years, but of course would like to know the result of dipping before doing it. One done no turning back, so I will leave for a while.