I have seen products which promise you to be “invisible” to traffic cameras. Products including sprays and license plate covers. Photoblocker sprays and license plate covers are illegal in WA state, and are a violation of RCW 46.16A.200. You have been warned, if you use these products, you are in violation of state law, and may be ticketed.
These products are sold on sites such as photoblocker.com, phantomplate.com, stopphotocops.com, stopphototickets.com and others. You have been warned, license plate covers and photosprays are illegal in WA state.