Paint will stick to anything—for a while. But the real test comes over time. Fabric, because it is a flexible surface that can absorb water, presents multiple challenges for a coating. Our biggest concern was flogging. If we can’t prevent the varnish on our grab rail from cracking after eighteen months, how can we expect any coating to adhere to a stretchy, pliable surface that is exposed to the elements—storms, high summer temperatures, freezing cold—year in and year out? To answer this question, we fit the test rack to the top of our vehicle and drove at highway speeds for 20 minutes.