This isn't working! Help?

I'm trying to make this shield that defends against bullets and paintballs, but it isn't working!

function onTouched(part)
    if part.Name == "Bullet" or "Paintball" then
        Shield = Instance.New("Part")
        Shield.Size = Vector3.new(.2,.2,.2)
        Shield.CanCollide = false
        Shield.Parent = game.Workspace
        Shield.BrickColor = ("Really red")
        Shield.Position = script.Parent

        local mesher = Instance.new("BlockMesh")
        mesher.Parent = Shield
        mesher.Scale = Vector3.new(0.2, 0.2, (script.Parent.Position - onTouched(part).Position).magnitude)

        explosion = Instance.new("Explosion")
        explosion.Parent = game.Workspace
        explosion.Position = part

        wait(1)
        part:remove()
    end
end