Re: If I Use Coil
Aluminum is sort of "self protecting" in that it forms an oxidation. If you clean that oxidation using any sort of polish to make the tubes shine, in a short time the oxidation will return to again protect the metal. If you want to keep yourself busy, make your tubes shiny and every few weeks do it all over again. Any product may stain carpet so it is always wise to cover anything you don't want stained and that includes painted surfaces.