How do I make my character glossy for everyone r15 and r6?

I've been trying to make a glossy effect for all players and for r15 and r6. r6 works, but r15 doesn't, and people can't see your glossiness, on your body and hats. Here's my code

game.Players.LocalPlayer.Character.Head.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Torso.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.HumanoidRootPart.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character:FindFirstChild("Left Arm").Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character:FindFirstChild("Right Arm").Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character:FindFirstChild("Left Leg").Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character:FindFirstChild("Right Leg").Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Head.Material = Enum.Material.SmoothPlastic

local Player = game.Players.LocalPlayer

Player.CharacterAppearanceLoaded:Connect(function(Character)
        for _, Child in pairs(Character:GetChildren()) do
            if Child:IsA("Accessory") then
                local Handle = Child:FindFirstChild("Handle")
                if Handle then
                    Handle.Material = Enum.Material.SmoothPlastic
                end
            end
        end
    end)
-- r15
game.Players.LocalPlayer.Character.Humanoid.LeftFoot.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.LeftHand.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.LeftLowerArm.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.LeftLowerLeg.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.LeftUpperArm.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.LeftUpperLeg.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.LowerTorso.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.RightFoot.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.RightHand.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.RightLowerArm.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.RightLowerLeg.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.RightUpperArm.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.RightUpperLeg.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.UpperTorso.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.Head.Material = Enum.Material.SmoothPlastic
game.Players.LocalPlayer.Character.Humanoid.HumanoidRootPart.Material = Enum.Material.SmoothPlastic
-- end r15