actually, the tire disintegrates due to the heat from driving on the sidewall of the tire, not the pressure from the lip of the rim on the tire. just fyi.
I would generally agree, I've never considered PPF for any of my previous vehicles but there is one freeway in the bay area that is part of our daily commute that I feel is notorious for debris. We just repainted my wife's bumper and after a couple months is got a good amount of rock chips...