I just apply some layers of vinyl electric tape on the nose of my boards.
Cut strips of ~ 3" of it, lay them parallel to the stringer and wrap around the rail (1" top 1" bottom, 1" around the rail)
Works nicely to lay the board on cement upside down without worries (on nose tip & kick pad), and to protect from everyday use. It never peeled off yet (clean the board with alcohol before applying, and do not stretch the ends)
Here it is on the nose of my board (lighter red part). The grip on the deck is versatraction.