Nothing really wrong, however, a panel will be a lot smoother than that before you pull out the disc.
Put the panel thru your ewheel to get a nice smooth curve on it.
Then, when you use the disc, you can feel the results as your smooth panel will get a slight dip in it.
With that lumpy panel, it's gonna dig in a lot more because of your sharp creases.
Keep your disc clean as it pick up metal from use.
But generally, it makes marks. Look at my pics and you will see spots with that same color.