[macder]

Try using some undiluted vinegar soaked into a soft cloth. This is an amazinginy cheap chrome shiner and might remove those degreaser stains w/ enough elbow grease. Another method that may work is a baking-soda paste. Just take baking-soda and add water so it turns into a thick paste. Then apply to crome and let it sit for few minutes and rub off. These are very effective methods using household items that should work assuming the degreaser(engine-cleaner) was not very abrasive. If the degreaser damaged the chrome then try using some steel wool since at this point you have nothing to loose.