BMinSFL

I do this on all of my cars now after a stone chip affected a front camera on a prior vehicle. Luckily, that one was a cheap aftermarket camera but it was a valuable lesson.

I ordered a small roll of 3M paint protection film (PPF) and used a 1/2" hole punch I had on hand. I then placed the PPF in the freezer, or sandwiched it between a couple of ice packs for a few minutes. As it cools, the PPF becomes stiff and is easier to cleanly hole punch.

Once the circles are cut, clean your hands and cameras and it's an easy 5 minute application. If installed cleanly, the film should not affect the image output. I even apply one to the rear camera. Someone may wipe it without proper lubrication and that may lead to image-obstructing swirl marks over time.