I used 3M clear paint protector on both sides of the tail (around the edges). It does wonders to reduce abrasion. I got mine from Tankslapper, already cut to fit. No, it's not perfect, but I've grown to accept a certain "collateral damage" to the cosmetics of my bike when necessary to aid function, and if it ever shows wear, it is removable.
That said, my bike just past 23,000kms and looks virtually new. By the way, I ride in every possible weather condition, as well as a little bit of gravel daily!