Yup, you need a wood burner. There is no way I coould do spikes without it! It makes it so much easier and faster. Just be careful and dont do what I did. I had a pair of finished baby bows sitting on my desk. I was working on another set. Somehow the finished ones got pushed under the woodburner and melted!
I was so mad cuz they were for an order I was almost done with
Oh well lesson learned, now I keep the area very clear.
I would put the large bow on the bottom, then spikes 2 colors, then next bow, then finish it off however you like. HTH