I work at a clothes shop and a woman came in twice, is she stalking me?
This is all the NY DMV had to say about it: If the DMV issues two vehicle plates for your vehicle, you must use both vehicle plates. Put one vehicle plate on the front of the vehicle and one vehicle plate on the back of the vehicle. There are no exemptions to this requirement. If there is only one location on your vehicle to attach a vehicle plate, contact a parts store to get a device to attach the other vehicle plate to your vehicle. The NYS Police and other law enforcement agencies recommend that vehicles display two vehicle plates. The two vehicle plates help the police to identify vehicles. The NYS vehicle plates use a reflective material, and the two vehicle plates improve the visibility of vehicles at night If you use one vehicle plate instead of two vehicle plates, you can receive a fine of $25 to $200 and mandatory surcharges of $50. The DMV issues one vehicle plate for some vehicles. These vehicles include trailers, motorcycles, and the tractor unit of a tractor-trailer.
Resin should be cheaper because the heat resistant materials for metal cost more, but you should check out 3D printing in plastic if you have a CADD file - check on prototyping companies and they will quote different methods for you.