It is an interesting test indeed and I learned I should never strip all the bluing off my rifle and leave it on a picknick table for 72 hours in bad weather.

WD40 really shined in this test and they were not even one of the companies products. They don't even sell it lol. The heavy grease of all types seemed to work very well but I store my guns inside and if it is wet while hunting I dry and clean them well afterwards.