Fixing badly road rashed chrome rims
I have a set of 18 in chrome rims that have a great deal of gutter rash on the lip. They are way beyond sanding and polishing. The rest of the rims are mint and ths my attempt to salvage them. Some of the rash is right through the chrome. I was thinking of cleaning out the road rash that is left in the gashes and then using a tig or a mig to fill them back in, grinding them down and then having them powder coated.
I tried my tig using a mild steel rod and argon and the very small amount of fill I put in came right off with a chipping hammer. I'm wondering if it came off because of the filler rod I was using (if so what filler rod should I use), was it becasue I didn't preheat/post heat, let the gas run after the weld was complete, or even worse is this something that can even be done. I also have a mig that I was going to try but I thought the tig would be more precise and easier to control given what I'm working with.
I'm not a total novice when it comes to welding but I'm also not certified either. I've been mig welding a long time and started tig within the past year.
Any advice on how or if I can do this would be great.