Mercer Island WA., upper end retirement community. The client, knowing that most older folks perceive yellow better than any other color, had been painting their stair tread nosing’s every 2 or so years to get great visual contrast. As so many do, they discovered that in 4 or 5 months their painted work could become slippery in places. This wasn’t viable for their community. They ultimately chose nonskid Vanguard SkidGuard Yellow as their permanent coating choice.