Protecting Vinyl Decals for caravans and motorhomes

[Dormouse]

oh well, at least they don't take up much room.

[Dormouse]

Any thoughts about protecting decals from anyone else?
This is the latest addition to the decals.

[Dormouse]

I have gone for Polish. But I am even experimenting with that. I have used Mer on the rear decal and will just use that alone from now on. Ditto with the off side rear decal - it is Turtle Waxed.
For the bonnet I have gone for this

Will let you know how it fares.