I did discover a hairline crack in the tank when I checked for leaks before painting it. Didn't even notice it as a crack. Just looked like a scratch like the one to the upper left. Barely weeps, but it weeps. Good opportunity to see if the green Loctite may come to the rescue in this situation along with a primer coat and a couple coats of paint and a clear coat. The crack is really exaggerated by the Loctite penetrating into it and making it obvious. Not as bad as it looks. Gotta wonder how it got there without any other signs of stress or major impact. If it still leaks after the painting I'll break down and buy a can of RedKote and deal with it from the inside like I probably should now. I'll let the Loctite set up real good before smoothing the surface and priming. Takes the runny green stuff a bit longer to cure than the red or blue, but it penetrates really well.