I posted about a year and a half ago about using construction style paper. Forget all the other crap. You can buy this stuff cheap anywhere, make a one inch fold in the middle of the long direction, and drape it over each side of the cab.
This allows you to install these even in very tight to touching scenarios, as when the construction paper is between the blades and the PF, it can rub all it wants and there are no marks.
It takes extra time of course now every time you want to lift the PF, but for the difference, it's worth it.