Simple soap and water. Avoid abbrasive brushes or strong pressure washers.
Always roll vinyl to avoid creases. If a crease does happen. Use a hair dryer to add heat directly to vinyl.
For very small tears. Just put a dab of super glue on the back side. For larger damage you can try pool patch kits applied to the back side.
The center line distance between ladder steps is 12".
The stand width of a RV ladder is 12".
The RV Ladder Banner has not been test for highway use. Use at your own risk.
Use a cable lock. You can buy 15" $5 cable locks online. (ex.: Cable Lock)