I've been using painter plastic for almost 2 years now. It's very light weight and cheap. I use blue painters tape to attach it. Makes it easy to remove.
Also it's a great bearer if you have cages side by side.
Helps with humidity too.
I use a home made. 1 gallon orange juice container. A length of air line for a fish tank and a air valve
Drill a hole near the bottom of the container. Hot glue the valve in place. Attach the air line
If you use the lid to the container drill a hole in it.
Works as good as the store bought...
There can be a host of reasons why he is feather picking. If he is sexual mature they feather pick. Mature birds usually pick at their chest area. If he contiunes to do this he will damage the feather follicles and they won't go back.
I had proven pair of cockatoos, and the males chest area...