I see you have found archive article on the Plastic coat, problem being
it has probably changed several times since . Seems like no one understands
what I am trying to say here . Aluminum does not like coatings of any kind
.
Leave it bare, keep it clean last longer than you or me. Nothing is
safe in the environment we live in , sad fact is its only going to get
worse . Once in Texas I Washed a T-6 Aircraft with the tap water, the water
etched the skin to white with lines took me 10 hours of cutting to remove
the stuff. Think about the History of said Coatings, Deal with facts not
fiction.
JW