Decoupaged Pop Bottle Bird Feeders

Hi Pam,
Decoupage is basically a thinned white glue. if you paint pictures on the bottles you do not need to decoupage. But if you cut out pictures or use any other type of decoration and want to attach it to the bottle, then you will use decopage to attach it to the bottle and after that dries, continue to add layers of decoupage to help seal them to the bottle. Allow each layer to dry throughly before applying the next layer. you may want to have 5 to 10 top layers. Since the bird feeders will be used outside they will have to be sealed with a clear paint. You can either use spray or brush on paint. I hope this helps some. If I can be of further help just let me know.
Diane