Cleaning just the radiator from the rear is not likely to bend fins.
But the real problem is that it is very unlikely to properly clean the FRONT of the CAC. And that is where the vast majority of the dirt is deposited.
Said another way, shooting through the radiator, air gap and CAC with enough force to blow the accumulated dirt off the front of the CAC is a very different beast.
Proper cleaning of the CAC really has to be done from the front.
And, best cleaner is Simple Green EXTREME. It is aluminum friendly-- developed for degreasing aluminum airplanes.