There is a difference between "just"
Oratex and
Oratex UL!
I use Oratex (self adhesive) once on a giant scale RC model of Brugger Colibri.
As I crashed it by turning back 180° on the take of to the landing field due motor stalling, the Oratex was peeled down from the wooden structure on many places on the impact with ground. When observing the broken wing, I try to pull Oracover and realize that it did not adhere well to the structure at all. I use proper way of applying covering to the model (iron temperature..) So I would not be brave so much to use Oratex on the manned aeroplane.
I rather use
Oratex UL 600/6000 and use the proper glue.
Oatex self adhesive could be used on manned planes just for the non structural items such as decoration and registration numbers.
Mitja