I am welder and never never JB weld. it contaminates the base metal, eventually falls out. and causes more grief, when a welder goes to weld. the pours are full of glue...and have to be ground out, thus making the base thinner.a good tig welder can weld that up! Yup he's right aluminum has to be very clean to weld. JB like's to pop hot metal on you then you have to grind all of it out and try again!