what is the best welder to use on a car fender to fill in rusted out holes?

Answer 1

A Millermatic 130 or Lincoln sp 135 using 030 70s6 wire and argon co2 mix (75/25). Most important, you neet to properly prep the rusted areas. Good luck.

Answer 2

I would use a tig or mig welder as it is a wire welder and uses far less heat which can distort metal. I wouldn't fill in the rust holes. They should be cut out and replaced with new metal.. If you just fill them in they could grow again. besides new metal looks so much better and to many welds on a fender will give it a warped look that even the untrained eye can see after it is painted..

Answer 3

I have to make the assumption that by filling in you mean to weld on a patch. The best job in obtained by TIG welding or GAS welding a sheet metal patch then using body filler to finish it off. A small 110v MIG welder will also work but requires more cleanup and skill to control the heat on thin body panels. If the panels are clean and you can get some scraps to practice on the MIG is the easiest to learn. The cheapest route is to get an old timer to show you how to gas weld with a coat hanger used for a filler metal. The downside is keeping the surrounding sheet metal from overheating and warping. It does take some skill. The preparation and the finishing is the hardest and most time consuming. Any method requires skill and equipment.