Last winter I built a small, off-road trailer and decided on Raptor Liner for a finish based on lots of good reviews and ease of application. The entire steel trailer was sanded with 120-grit paper, then thoroughly cleaned with acetone and a wax and grease remover prior to applying the Raptor epoxy primer. I sprayed the primer with an HVLP gun and let it cure before applying a couple of coats of tintable Raptor with the included spray gun. The coating cured quite hard like I expected it to, but a couple of months later a ~50 mile trip on gravel roads thoroughly chipped the Raptor liner on the leading edges of the fenders and the front of the trailer box. The chips go right through both the Raptor and the primer, exposing bare metal. Also, after transporting a few things in the trailer box large chunks of Raptor liner are chipping up off the floor. At this point I am unsure if this is caused by improper prep or application techniques when I sprayed the trailer or if there are other factors at play. I would also be open to recommendations for how to fix it. Out of curiosity I took the trailer to a local LineX/Rhino Liner shop and they said if I brought it in blasted to bare metal they could coat it for around $2000, which is definitely out of budget.
Here is the trailer prior to paint:
Applying primer:
And after applying the Raptor:
The finished product:
Here is the trailer prior to paint:
Applying primer:
And after applying the Raptor:
The finished product: