It never goes away does it? There's always someone trying to tell you and your clients that this new wound paint product will ot only stop nasty bugs getting into the wound but will speed up the "healing" of the wound.
All we can tell our clients is that as yet there is no evidence that any of these products are any better than the natural physical and chemical response of the tree itself. In fact most if not all of them make matters worse for the tree.
If you would lilke some back up for that position just have a look at any of the late Shigo's work, he spent his life telling us all that the best thing to do with wound paint was to make the people selling it drink it.
This sumerises it pretty well;
Wound%20sealer.pdf
I'd agree that getting a healthy replacement going now would be a good move.
SF