You can easily repair corroded or oil-impregnated areas that can be next to impossible to fix using welding machines with #aluminum welding rods or other brazing products. http://www.aluminumrepair.com/
How can I 'Weld' Aluminum Without a Welder? This is how on brazing aluminum with brazing rods using a propane torch on building the lift top coffee table. Items used here are propane torch, torch trigger, aluminum welding rods, aluminum tubing.