I'm all too familiar with the symptoms as well as the fact that it's only our low cost, budget, underbidding competition using cheap house brand materials that its happening to bhere, and after only 2-3 years. In the last several years, we've replaced ZERO signs of our own making and about a dozen of other's substandard work. That's not saying that a few of ours aren't showing some signs of edge shrinkage and a little fading, but overall our work seems to be holding its own against the elements. Using OEM ink, good quality materials, substrate prep practices and good application methods certainly helps.
Where we differ from those using inferior materials is that we're not like others who are promising people that their signs will last 7-10 years when we all know that even with good quality material, getting 5-6 years out of a sign exposed to direct sun is the more realistic expectation. When the others disgruntled customers eventually end up at our door, they describe being told what we consider unrealistic durability expectations.