Use Microdots to Protect Your Car From Thieves
Pimping Your Auto
A microdot is a miniature security tag which carries information sufficient to identify the origin of the part. Each microdot is barely big enough to see. It carries a unique serial number, or the VIN, and contact information for the company which manages a registration database. Microdots are easily made in batches of a few hundred. Within a batch each dot has the same serial number. They can be attached to car parts by adhesive. As soon as they are attached the part can be traced.
Source: Automotive:Car-Detailing-Customization