Kinda.....
When I asked a Fein rep about sanding with the Supercut years ago, he suggested that I only use it for cutting. That being said, "Yes" you can sand, but you will need the adapter for using Multimaster-style accessories, you'll need to buy sanding pads, sheets of sandpaper, and after all of that you likely won't be happy with the results, as compared to an orbital detail sander.