Shrimp Boil Kebabs

Name: Shrimp Boil Kebabs
Ingredients: 1 pound baby red-skinned potatoes (16 to 18); 1 lemon, halved, half cut into wedges; 4 garlic cloves, 2 smashed, 2 finely grated; 2 bay leaves; Kosher salt and freshly ground pepper; 1 1/4 pounds shell-on jumbo shrimp (16 to 18); 1/3 cup extra-virgin olive oil, plus more for the grill; 8 ounces kielbasa, cut into 1/2-inch-thick slices (16 to 18); 1 ear of corn, husked, ends trimmed, cut into 8 rounds, then into half-moons; 1 tablespoon Old Bay Seasoning, plus more for sprinkling; 4 tablespoons unsalted butter, melted