I see, so it's the scanner that just adds unwanted marks. Scanners do a really bad job compared to cameras, but they're easier to use. With cameras you have to make sure you have good lighting and that your camera is still. I usually set a timer, because when you press a button, even on your phone, you will likely shake the camera just enough to make the image blurry, even with high shutter speed. And then in post processing you have to correct the lens distortion. But I think although there's more preparation, with beautiful artwork it's worth it to get all the detail and colours right. You just have to set it up correctly.