I can't be sure if this is truly a bug or it's intended. I have asked a mod who says 2nd application has no effect.

I accidentally applied Restorative on a plank a 2nd time and it sort of reset the plank. Kinda like applying roll to a mouse a 2nd time removes the roll. What's even weirder is that when I tested this with a friend, she placed a box under the plank to make it stand upright again... and it miraculously stays upright as if the 2nd application never happened... (yes, she cannoned the box away. Though, for some reason, when I test this again, I can't make it stay upright)

Reason why I'm posting this is because it's a bit worrisome as during shamming with a time limit, fast shamming would most likely put the restorative very close to an already plastered plank. If it so happens to be close enough that it reapplies the restorative, the entire build might collapse and frustrated players are not fun players. If this is intended, my apologies - you can close this thread and I suppose I'll just have to be more careful when shamming. (It wouldn't really make sense though... xD)