Welding help needed

So i am just about to start welding a patch panel on the rocker of my 55 Dodge, and before I start I figured that I should check my welding ability first. To start with, here is the mig that I have, borrowed from a friend. I have had this welder on semi permanent loan for a year and have used it several times with, what I think is, decent results. I am also attaching a couple pictures of welds that I have done with it on my 50 Dodge gasser project. Bear in mind that I am in no way a trained or professional welder.

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