That's one of the first things most of us wondered about when we first got our A-frames so you're in good company. The answer is no, because any kind of coating prohibits the floor from drying if/when it gets wet. I think it would also void the warranty.
It's never too late to have a happy childhood!
Lee, WU0V, and Courtenay, N0ZDT
2011 Rockwood A128
2000 Silverado 1500 pickup
60W solar system
2000W inverter generator