Fly pressing technique

I pierced a stencil in galvanized steel with rose petal veins as shown in figure 2 for fly pressing . I fly pressed the petal in figure 3 but it didn't come out the way I wanted. I had to try again piercing the petal in figure 4. I forged it thinking that it will work because the metal is more thinner. I tried to fly press it but still it didn't wok. 

Figure 1- Mthethwa, F., (2020), Prototypes, galvanized steel and copper.

Figure 2- Mthethwa, F., (2020), Stencil, galvanized steel.

The image in figure 2 shows the pierced stencil steel. 

Figure 3- Mthethwa, F., (2020), Fly pressed petal, copper.

Figure 4- Mthethwa, F., (2020), Forged and fly pressed petal, copper.