Line-x, Rhino or manufacturer spray bed liner?

We had our bed sprayed before installing the hitch with a product called Full Metal Jacket. Have only had it for about 15 months, but shows no degradation yet. Although, we do keep it in the garage most of the time but have hauled a number of things with it and no scars yet. We had Rhino Liner in our last pickup for nine years and were very satisfied with it as well.