Iím wondering if something was lodged in between the skin and the guard at that point. I only open mine up for cleaning so itís possible something could lodge itself in there a day after cleaning and be in there for months on the road without noticing. Until now Iíve not had anything similar. Iíll see when we get ready for camping in April.
Havenít heard much about this in the forums either. Not sure how or if that can be cleaned. Aesthetically itís behind the rock guard so itís just our little secret
- but if itís damaged, you probably want to treat it so it doesnít spread, or patch it.
Iím sure someone will chime in with more helpful advice on how to handle it. Good luck!