It is down to economics as to whether or not you get the work done. The metal is 0.75mm it can be spot welded and you can still buy after market repair pieces
Yes, rear three quarter n/s wheelarch and sill on a 2005 panda 4x4. It was cheap enough to buy full sill and make my own part panel. Made a better job of it than whichever bodyshop the insurance company gave it to after it was side swiped by a taxi.
I saw that, it’s always a little daunting on modern thin, and galvanised, steel. As an apprentice we were taught welding basics, I was rubbish at oxy-acetylene and okay at gas/mig. I have to say much better at stick welding but this is for much thicker steel which, as a farmer, is generally where my stick welding comes in.
I have an old Cebora gas mig that has served me well, it has had new bits put on it, torch and lead. Unfortunately the wire feed went and is no longer supplied, the ‘formulaic’ pattern part gave up within three months, so the welders now a paperweight.
I now have a cheapish gasless and have to say, it’s not bad…just need to practice on a sacrificial piece before getting stuck into the job to get settings right.