In several places on my 5er you can see where the fiberglass protrudes out slightly where the frame runs behind it. In most places you can only see it in the right light, but others are more noticeable and you can even feel it by running your hand over it in the area. My first question is what causes is? And is this fairly common or something to be concerned about over time?
2015 Attitude 28SAG w/slide
2012 GMC 2500HD SLT Duramax
B&W Turnover w/Andersen Ultimate 5er hitch