Marking items, having photos of items, having an inventory (etc) are wonderful for insurance
claim purposes. However, the markings, like serial
numbers, are academic if a thief wants your stuff. But you can try. (See other threads on boat security
Case: I'd purchased two new ball fenders and, using a solder iron, carved my boat's name into the tops. Hung them next to my old tube fenders.
The still-new looking ball fenders were gone within a week, leaving my old fenders looking forlorn.
(Yes, I knew that carving a name into the fenders weakened them, but figured even should they one day blow they'd still provide some cushion effect.)