Disassembled the steering knuckle and disk brake on my 1979 front axle. The backer plate/dust shields are pretty nasty and I was considering getting them blasted and powder coated. However, I see “backer plate eliminators” for sale. Would I be better off getting a set of those, rather than trying to salvage the original backer plates? I assume there’s a good reason the eliminators are an option…..