The best way to prevent oxidation is to keep the decals clean and dry. If you live in an area with high humidity, then you may want to store the decals in a cool, dry place when they are not in use.
You can also purchase RV decals that are already treated with a clear coat. This will save you time and money in the long run .If you take these steps, then you can rest assured that your RV decals will stay looking great for years to come.