TwistedPhil
+1y
I've sold a lot of these pans, and most people are just bolting them on (ours have endcaps that let you screw them into the sides), then build up some fiberglass structure over the top, sand it flush, and prep and paint like normal.
One of our local customers has had one on his truck for a couple of years (daily driven) with no cracking yet.
Of course, if you drag it or hit something, the seam will be the first place to crack, but if you take care of it you should get years of use...
If you're not sure, just bolt it on there- it's better than the stock bumper, at least!!
-Phil at FBI