Once the topper is completely dry, steam it (or place it over boiling water for 1-2 seconds - be careful not to burn yourself). The topper can't be wet, you just want the surface to become slightly sticky.
Use a soft brush and silver dust to dust the topper. If the surface is too wet you will get marks on the surface, so it's better to work gradually (steam --> dust --> steam again --> dust again and so on). I dusted the back first and then the front.
Insert a #18 wire in the top of the head (centre of the circle).