Bunny safe wood treatment?

[catxx]

I know this Q must come up a TON, but I need to make a wood door in the side of my existing run and have no idea what weather treatment to put on it that will be safe if the bunnies chew on it, hopefully they won't but you never know!

 

[Stator]

A lot of people use Cuprinol Garden Shades / Heritage Shades or Wilkinsons Colour Your Garden. Both say they are harmless to animals once try.