I've had the F-Stop Tilopa camera bag (original 48L one, not the new 50L), for about 12 years, and a few years ago the rubber coating (Hypalon?) on the front of the bag (the part you lay on the ground when opening the bag) began to deteriorate, and started to shed black particles all over. F-stop considers the damage part of wear and tear and not covered by warranty, so is there a way to fix it? I suppose I can attempt to peel off remaining coating somewhere outside, but would that compromise the backpack? Has anyone experienced this issue before? On a related note, are there similar bags to original Tilopa (new one is too big) that are maybe slightly lighter?