When it comes to welding, there are a few different ways that you can hide welding marks. One way is to use a weld bead cover. This is a thin metal plate that covers the weld bead and helps to conceal it. Another way is to use a filler rod that matches the base metal. This will help to blend in the weld with the rest of the metal and make it less noticeable. Finally, you can also grind down the weld bead so that it is flush with the rest of the metal surface. This can take some time and effort, but it will ultimately give you a much cleaner look.