I replaced both rear arch liners after procrastinating for three months. Both liners were wore through a tiny bit at the outer, center, portion of the liners from way back when I first mounted the current wheels with the 8mm spacers I was running with the oem 18s. I quickly removed those spacers but the damage was already done. That was nine years ago. So, I didn't take pics but what I found wasn't bad at all. No rust and just 1.5 to 2 inches of accumulated debris behind the liners where the liner ended at the forward edge of the liner. Sucked all that out with the shop-vac and installed the new liners.