Hello there just stumbled across this great forum and have my first question allready. today i have been trying to repair an aluminum casting whisT im to belive is a 5% magnesium casting .. i have been trying to repair it with a 5356 5% magnesium Welding rod and using pureshield argon 99% pure gas... it seems the parent material doesnt like this does anyone have any suggestions on a better/more suitable rod/gas combination to try ?? any help would be greatly appriecated.. Darren