I am hoping to try some forge welding eventually, but have a few questions first. Firstly i know anhydrous borax is the way to go for flux, but it also eats the forge lining pretty fast. My questions is will it eat the wool and upper lining due to fumes or is it just the molten flux dripping onto the bottom brick that eats it. If it is just the bottom brick i am not concerned too much because i have a large quantity of boiler bricks I can replace. I would however hate to have the vapour eat the wool in the sides and upper lining since my forge is new and i do not want to have to rebuild it any time soon. Also if it is mostly just the drips, my thought was to fab up a small stainless drip tray basically that would cover the bottom lining of the forge. Does anyone think this would work? I really want to try some welding and maybe some small damascus but i dont want to ruin my forge either. Any advice here would be greatly appreciated.