Cardboard worked for me, but you'll need to scrape it off afterward, and it might take a while. Plus, the
Junk Bin Rental service staff that we had come over and dispose of all the garbage produced during the construction couldn't be more grateful as they needed cardboard for a recycling order they had at the moment. It was a win-win situation which also got us a decent discount on their services. We also felt better knowing that our garbage was going to be recycled instead of polluting the environment.
