Before I get started, I have to apologize for my not-so-great pictures...it was late and I was in a rush.
First things first, in order to get your liners to flatten out you'll have to fold your liners in half.
Then, to create your starburst pattern, cut slits every so often. Measurement is up to you completely. Fewer slits means bigger "rays" and more slits are smaller and more "rays."
When you are done simply apply with a glue gun! I used several different liners as you can see and in some areas I left some folded and glued to the sides. I also have bits of black netting in places although it didn't really show up in the pictures!
If you try it out, send in you own picture! I wanna see!