Never put anything over chrome that will clog the pours. It will derteriorate from inside out. Most chrome rusts from the inside out. Keep it clean with windex or something don't seal the moisture in. Keep the goo off the chrome. Ask any metalergist or materials engineer.
No offense, but I disagree with those assertions, as well-intentioned as they may be. Chrome is so widely misdunderstood that it borders on black art.
First off, at the microscopic level, chrome plating resembles roof shingles. That is, overlapping scales of metal plating. First, there's a layer of copper (some platers have stopped using copper because of the expense). Next is a layer of nickel, that's most of the substance of a plating job. Nickel has a yellowish look until submerged in chromic acid. Hexavalent chromium is almost clear, it's the interaction with the underlying nickel you're seeing and that most people erroneously believe to be the chrome. The whole system forms what appears to be a continuous, impervious, surface. In reality, it isn't. Once you see red rust, the layers have all been penetrated right down to the base steel and the damage has been done. At that point, the best you can hope for is to halt the rust from progressing any further. Frequently, the rust will spread beneath the copper and eventually one of those dreaded "rust raspberries" will erupt through the plating.
Over the past four decades, we've successfully stored cars & bikes with a heavy application of non-cleaner-type carnauba wax applied to all of the chrome pieces - leaving the excess in place. In the spring, the haze gets polished away and the chrome is always just as it was prior to winter storage. This also works on cars that see road salt. Grease & cosmoline are highly effective, too. They're very messy. The wax or petroleum coating seals the non-continous "plates" or "scales", keeping oxygen out. Without oxygen, there's no oxidation...a.k.a. "rust".