well as a welder <img src="/forums/images/graemlins/nana.gif" alt="" /> if you don't get rid of the rust first it will only continue to spread, It needs to be cut out weld a new piece in, then weld a patch over that.It should last longer than any other part of your frame.The key here is to make sure you are to bare metal, if you try to weld over the rust or paint your weld will have inpurities in it and hence comes your broken weld.I can't see why people are turning you down to weld that.I would prefer a mig for it , because you will get better penetration in the metal, but a tig will work as well.Stay away from flux core wire, get someone with a argon/co2 bottle or argon with tig.good luck <img src="/forums/images/graemlins/patriot.gif" alt="" />