Anodizing is an electro chemical coating process. Only a caustic chemical like oven cleaner or something with acid will bother it . Brake cleaner , carb cleaner , non caustic paint removers etc will remove the paint and as long as you don't "rub" on the anodizing , it will not be affected. Since the anodizing process etches the aluminum it is often used to help paint adhere to aluminum parts besides inhibit corrosion ( it's main purpose).