You need to cut them out and then twiddle the gumpaste on the wire. Then sandwich the veiner with a sponge on your cut out with the wire. Then use the ball tool to thin out the edges.
Check youtube for tutorials. You can buy the cutters from several different places. You can also get dvd's that have exactly how to make them. But basically most of the lillies are done the same way. You might just need to change the size of the cutter or center to make which one you want.
There is a tutorial on cc
http://cakecentral.com/articles/131/how-to-make-a-gumpaste-stargazer-lily-asian-lily
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