If you inspected Will Foreman's SUV, you might notice how clean and shiny his Maryland license plates are. But you probably wouldn't detect the clear glossy coating the Howard County resident sprayed on them eight months ago to thwart traffic cameras from snapping readable photos of his tags. "It must work," says Foreman. He has not received a traffic camera ticket since using a $29.99 spray called PhotoBlocker. Foreman, owner of Eastover Auto Supply in Oxon Hill, also coated the plates of his eight delivery trucks. He says they previously drew $1,200 in photo-radar fines but none since the application....