Hi Ruby, are you looking to decorate it in place or turn it into something else?
Gotcha! Here are a few ideas that use old garage doors. Maybe one will inspire you! https://www.bobvila.com/slideshow/garage-doors-repurposed-9-innovative-design-uses-47137#rustic-living-room
Maybe an accent wall in a garden.
It's not attached it's been yaken down
Trying to fihure out what to do with it
There's no money in trying to sell it
You have to specify what type of door if you want an answer.
How to do drainage pipe
Hi Ruby, here is a link that should helps you with this, hope it helps you out