Yes, true. And putty not ONLY changes color (and it does). It also shrinks as it dries out, and can actually separate from the underlying coin.
Yeah I was able to read up on it around the forums after asking on this thread. It's basically filler for scratches and marks, similar to if you were to use spackling on dry wall, in layman's terms at least. What's interesting is that it passed muster with the TPGs before - e.g. the flat plane of the fields and the break in luster - which makes me wonder how good fresh putty must've looked compared to the sheen and general look of metals. It also makes me wonder if coin doctors have tried to "putty" coins using metals of the exact composition to fill in the scratches and marks. Of course, that would still look weird since the cartwheel would break and be like metal casting filler.
Indeed. I first encountered the incontinence, back at a coin show in 2010. Guest speakers in the know.........John Albanese from Green Bean university, but he knew of what he spoke.
Yes, the break in the luster is there. But it's hard to see because the color usually matches perfectly and because it is so small. The putty isn't just smeared on the coin, it is only put into the contact mark itself, with great care taken to get no putty around the outer edges of the mark. So unless you look very, very carefully you will not see it. And even if you do see it, it's all to easy to assume that it is nothing more than a very light contact mark that has broken the luster. In other words, they simply don't realize that it is putty. And contact marks are not a reason for no grade. And when they are very, very light, they don't even have much negative effect on the grade. That is why putty is used, because it allows coins that if left alone would probably grade 2 or even 3 grades lower. And with some coins that mean a difference of tens of thousands of dollars, and some a great deal more than that.
People with ridiculously more money than us who are ready to spend it on a coin. (edit to add: ...and degenerates who don't have ridiculous amounts of money, but spend the money they should be using for food and rent on coins)