I've checked the axle tubes and there are 4 plug welds on each, with only one leaking, and the tubes aren't turning at all, so I am trying the JB Weld technique for now. Cleaning has been done and 2 coats of epoxy are on there. Tomorrow I will sand the surface, prime and overpaint with black Hammerite. Then off for a test run on Wednesday. If it fails it will be a trip to the welding specialist. I'll post some pictures of the stages when the work is complete.