Crack in trim molding along bottom of 5th wheel

[dvkiel]

A crack has developed in the bottom trim molding that runs along the bottom edge of my 5th wheel. The piece is either plastic or fiberglass, and seems to vibrate alot due to wind while traveling. Does anyone know of a good repair procedure for this. Will a fiberglass repair kit or bondo be the appropriate repair product. Thank you all for any help or suggestions with this, there is a wealth of very knowledgeable and expierenced people on this site.

[Ray,IN]

If it's plastic, any auto-body shop can repair the crack by welding, sand it smooth, repaint, and you'll never be able to detect the repair. The back side of the crack can be reinforced with extra plastic weld to prevent future occurrence.
If you're a DIY person, rent a plastic welder-but you must buy the same filler-rod material as the molding.