Fixing untidy welds.

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Guys, I'm busy on this job for a client and my buddy came over because he had nothing else to do and wanted to help. I knew the guy could weld because he used to build off road car chassis'. I had already jigged the job and welded a bunch of tubes. I went out for a few hours for a meeting and my buddy decided to do some welding. He changed the setting on my mig machine and got stuck in. His welds are probably strong but they look nothing like mine. There's a day and night difference and the client will see it. It's all round tubing and there's lots of braces and triangulation. What do I do to fix the mess?. I can't start over or try go over his welds. I'm thinking of grinding a vee into the joints and going from there. Any advice will be appreciated.
Reply:Put some pictures up if you can, otherwise if its as bad as you say you have the right idea.  Also grinding into it wool give you a better picture of your friends welds.seabee78
Reply:I think you answered your own question.  I have had the same dilemma in my shop, and that is why I have a wide variety of dremels, cutters, sander, you name it to hog out bad work. A lot of the time it takes more skill to correct a bad weld than doing it right the first time. I would not let it out of my shop.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:smooth it down with a tiger disk, then TIG over it.
Reply:Originally Posted by TimmyTIGsmooth it down with a tiger disk, then TIG over it.