Can scratches on diamonds be buffed out?

Could you elaborate on whether scratches on diamonds can indeed be buffed out? I'm curious about the process and whether it's a common practice in the jewelry industry. Are there any limitations to this technique, such as the depth or severity of the scratches? Additionally, would the buffing process affect the diamond's clarity or value in any way? I'm interested in understanding the intricacies and considerations involved in restoring the beauty of a scratched diamond.