If you don't want grip tape then google map your area for a place that makes vinyl decals for store window, race cars and such.
Tell them what you want and they will advise you on the best option. They can make it in whatever color and size you want and the non permanent stuff works based on static and will last about 7 years. After that long it will still peel off with a little heat (hair dryer in winter or full sunlight in summer). They can also do full color graphics printing on a base stock of white vinyl that is also completely weather proof.
That also leaves you the option of peeling it off if you don't like it or getting an extra set to make everything look new again when/if you do drop it some day.