In my experience the PPF film should suffice ... but I'd also add the supplied tape, assuming the extra thickness of both isn't a problem ... Protection (EBTG).
We fitted a similar clear Aussie deflector to our 2003 CR-V. After 8 or so years, 80K miles, car washes, etc. the metal mounts were a bit misshapen and the protective tape was wearing away. I reshaped the mounts and used small bits of clear, thick packing tape to remount it.
All went well for several more years and 20K miles ... looked good when we sold it. (College Hills Honda imported several Australian CR-V accessories ... bulk quantities, good prices.)
2017 CX-3 GT, AWD, i-ActiveSense, Ceramic Metallic, Black ... His: Zoom, Zoom!
2016 HR-V EX-L, AWD, Milano Red, Black ... Hers: Putt, Putt.
Last edited by mainemanx; 03-20-2017 at 10:55 PM.