I am in the process of replacing the original cracked/broken/UV-hazed rock guard on my '67 Globetrotter. I was surprised to see that the factory used panhead sheetmetal screws to mount the guard to the trailer. Is this still the most common and correct method of attachment. When watching the DIY network's Airstream restoration show (Classic Rides), I think they mounted their rock guard with rivets. Also, I saw an episode of RV Roadtrips (with Gary Bunzer, the RV Doctor) where they mounted an aftermarket (smoked plexi) rock gard on the front of a '67GT with rivets as well. How have those of you who have performed this upgrade mounted your guards? I only plan on doing this once as that replica rock guard was not cheap!
Thanks in advance