Originally Posted by
brettzo
I've never used photoshield specifically however have tried photoblocker to test it's effectiveness and it doesn't work at all. There's an intersection in my city that used to be equipped with a red light camera and a K band speed sensor, which would issue warning citations for speed and an actual citation for red light infractions. I tested this stuff on this intersection driving 15 km/h over the speed limit and sure enough the warning came in the mail a couple weeks later. Applied more spray, tried again and another warning several weeks later. They have now changed that system, probably thanks to me using it as a test zone and now issues real speeding citations, so I won't be trying that anytime again.
You have to also keep in mind that the reflective nature of these products will increase your laser vulnerability.
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