Massive improvement.
Fortunately your weld lines are where you can mostly hide them like you said with a skim if pog.
Do you have a section of plate to weld over the side door section?
Been down to he garage this morning.
8.75" X 9" X1"
This what you need?
Hand for size perspective. It's quite heavy, so no good for posting.
Let me know what you need.