Plastic rocker panels?

Just got my new tundra today. Looking things over I noticed the rocker panels, at least the covering, is plastic. It’s held on by a bunch of push pins on the underside and Phillips head screws on the front side. I rust proof my own vehicles and was wondering how everyone is accessing the metal behind this to spray with rust proofing? I may be able to pull a few pins and fit my 90 degree hook wand in between the plastic and the inner rockers but was just seeing what the consensus was amongst owners who have had their trucks sprayed.