I was wandering around the new Fire Station tapping walls with a stone axe to see how many hit points they had with an eye to building a base upstairs. I tapped a bulletproof window (which didn't have as many hp as I was expecting) and now I can't repair it. The wiki says you 'repair' them with new blocks which I do have in my inventory, do I need to just smash the affected panel out and replace it ?