Panniers grinding away racks (and frame!)

[biciclero]

Has anybody else had a problem with Ortlieb (or similar) panniers grinding away your rack? I noticed mine were actually grinding away my frame and rear derailleur cable housing as well as the rack! I managed to zip-tie a couple of rubber door stops to the bottom part of my rack to prevent the frame rubbing, but man! These bags are going to make my rack useless within two years of use! I never considered my racks to be "consumables" before, but it's starting to look like they have turned into that. I figure once I can see through to the inside of my rack tubing, it's time to get a new rack.

If you've had this problem, are there any good solutions? Tape for the rack? Padding for the hard plastic bits of the bags? Stainless steel racks (I've got tubular Al)?

[scaryseth]

I am noticing this as well on my rack. Also Ortlieb bags. Thinking of wrapping a little but of tape on the spots that are rubbing.