What: Refine edges > Apply > Done!
Where: in Affinity Photo
A client wanted his name as his logo in a handwritten style. He was thinking of a handwritten font; I asked him to actually write his name for me because if you want personal, it’s often good to be personal. He wrote his name for me on paper, took a photo of it and emailed it to me.
I did all the obvious things: increase contrast, select the light background with the Flood Select Tool, Invert Pixel Selection, copy and paste it to a new layer. So far, so good. It looked smooth.