Yeah, probably no good. Rod goes bad when it draws moisture. Most welder's keep their rod in a heater. I keep mine in a closet under the stairs in the middle of the house( my wife is thrilled-whatever).
Also, when you weld the bung in be careful with the heat. I tried to do one a couple months ago and the heat warped the bung to where when I screwed the plug in after it wiped the threads. I ended up having a muffler shop do the next one because I only had enough pipe to try one more time and I didn't want to wait to get more in the mail. I think the guy charged me $50 for the bung, plug and to weld it in. Probably took him 30 seconds.
