I have been welding using a Simple Miller welder now for 3 or 4 years. I am a hobbyist NOT a pro. One of the things I like to do is to polish the aluminum when the part is complete.
One of my major complains is the cleaning line on both sides of the weld. On my machine, I have a little control by limiting the heat used but is there any other way to control the width of the leaning area. It is real hard to polish out.