What can I line a wooden rabbit hutch with?

Question:I'm thinking oif getting rabbits and was planning to get a metal one but I was told it could heat up in Summer which is really hot here in Australia so I was advised to get a wooden one but appently rabbits can chew any ledges that stick out. I read in a book that any ledges sticking out should be lined for insulation and to stop the gnawing but it didn't say what to line it with. What would I line it with and how would I go about it?

Answers:
Old newspaper works well. Flour and water paste as glue. Bear in mind pregnant doe will use that as bedding. Youmay have to reline hutch every now and then. Cheap and easy though.