Interior paneling
From Bearhawk N813Z
My plan has been to not fabric any interior. There's just something about it that doesn't sit right with me even though airplanes have been using that method for 80 years. It prevents easy access to some hidden stuff that may need to be accessed.
Been thinking of using this foam on the interior side of the exterior fabric. In some areas I will use Kydex, and adhere the foam to the back of the kydex panel.