I've not tried this brand, but I did try another paint on that came in a big paint can. The name escapes me but can was yellow. Manufacturer claimed it was effective 98% of the time. Unfortunately my horse was one of the 2% that consider it a condiment for wood.
Now there are a lot of brown boards and the stuff is oily enough that I doubt I could effectively stain or paint over it.
I have a young one that seems to be "picking" around here and there on fences. I have treated him with ulcer meds, even though I was not sure if that was the problem. I honestly think he just gets bored out there sometimes. He has playmates, one of those big balls (which has sat in the same place out there since I put it in!). It is not that bad, just wanted to know if anyone has tried this product.