In a small bowl add butter, lime juice, honey, chili powder, and cayenne pepper then mash with a fork until well combined. Refrigerate until ready to use. Preheat a grill to medium-high then add sweet corn and grill, rotating occasionally, until evenly cooked. Spread while hot with Chili-Lime Honey Butter then serve with extra salt for sprinkling and lime wedges for drizzling.