Adjusting the Radius slider may take off the scuff marks. But, there exists a tendency that overdoing it may make your perimeters fuzzy as well. If occurs, the alternative should be to alter the Threshold slider. And this will permit the specifics to go back to make the image sharper with all the scratches disappearing. You must be very careful not to set them too much, or it will produce smears on the picture. When removing the scratches, picking out the complete picture will not soften these types of marks. The option is always to choose the area in which the scratches are situated, and you may make use of the Lasso tool to get this done. Then you can feather the perimeters of the selected area so the chosen section won’t be evident on the photo. 

Feather tool

This can be done by clicking your Feather tool and then click the Scratch and dust Filter once more. You’ll be able to replicate this method of altering the Radius and Threshold sliders to get the preferred look and cut these scratches. Repeat by selecting the spot you want to alter when there are still noticeable spots on the other regions of the picture. To complete the task and make the picture-perfect, it is possible to crop the image enough to cut the picture’s cracks and split perimeters.