I noticed I had a leak on my ball lock keg. As determining where the leak was, determined first it was a bad ring on the gas post. After I fixed that, I could still hear a leak. I used Starsan to spray connections/tank(which works great for finding minor co2 leaks by the way). The leak is coming from the actual keg- right at junction of rubber collar. I bought these reconditioned a few years ago- and there is a dent right in that area. Guessing over time, pressure and getting bumped around, it finally gave. Has anyone had any success in patching leaks like this? I can't visibly see leak- so it is just a pinhole, but wondering if it can even be fixed. Thanks in advance!