Trying to take the easy way out. I will try to find my old specs from the test I did years ago but thought I'd ask here first. I know its pretty basic. I have held the verticle up,and mig overhead, and flux core overhead, and a ua 13 pipe welding cert. Its just been awhile and I have been welding on sheetmetal for the last few years. What size rod, amperage should I be looking at for a 7018 smaw 3/8 plate overhead with backer. Three passes I was told. Sheet metal worker by trade but the boilermakers need some welders. Thanks for any help.