I tried welding that panel a few times and just end up buckling it up. M machine do a lower quarter panel that I'm yet to try. I had a Clarke pro 90 was always inconsistent. I have a Sealey Supermig 130 at the moment but find it inconsistent also. Think It's down to no Eurotorch and the sleeve not liking to be bent.honestly....im considering changing the whole replacement panel, the fitment is shocking and will require a lot of hammering to get right lol
should I have just spent the extra money and gone with heritage.....
I used to have a Clarke mig which I thought was good, but the r tech is just awesome. I have made up 2 leads for it, one on a 13amp plug for anything up to 3-4mm then if im welding anything thinker I use a 32amp plug . will upload some pictures tomorrow and show you what I mean.
Don't let that quarter repair get you down a skim of filler might sort it.