My BK bar was secondhand and the tape strips were worn out, so I used helicopter tape, it is the stuff (that I believe) is used on the leading edge of rotors and propellors to protect from dirt and debris. Here is what I used:
https://www.amazon.com/gp/product/B000O6BQMG/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I don't have it down low like in the photo above, I only have it on the roll hoops behind the seat where the BK bar attaches.