That’s too easy – won’t the thief scrape off the Smartwater?
Well he can try but is unlikely to succeed. Other methods of marking involve etching or pens which are prone to erasure, Smartwater is different. The instructions suggest that Smartwater should be applied to complicated areas that are hard to clean such as uneven surfaces, areas adjacent to grills and slots. It is highly unlikely that any thief will be able to remove every trace of Smartwater from complicated areas- and the police only need a minuscule amount of Smartwater to make a positive ID. However it is just as important to let the thief know that the property is securely marked with Smartwater.