New Airstreams come with a rockguard installed over the front windows. Not only does this rockguard protect the front windows from road debris and rocks, it also provides shade for the front of the trailer.
This is what a modern Airstream looks like. Notice the rockguards over the front windows.
A search of the Airforums website revealed that they make a rockguard for vintage Airstreams. While it has been our intention to keep the trailer as close to original looking as possible, I decided that the protection that the rockguard offers is worth the tradeoff.