I came across an interesting video today of a coating called Ultra Ever Dry. I was impressed enough that I called the manufacturer. They informed me that the product was engineered as a corrosion protection coating for bridges but has since been used in numerous industries and has even been sold to Boeing for corrosion protection on their aircraft. I asked if he had the FAA certification paperwork on this of if Boeing bought the product and handled the certification. He is checking but will get back to me. In any case it is an extremely hydrophobic coating and it seems would be an excellent coating for inside the wing and unpainted portions of an aircraft fuselage. FYI I am building an 8 (1 quick bulid) and did not do any major corrosion protection inside the wing beyond the wash prime that Vans does with the QB wing. I was planning on using corrosion X as an inhibitor but it's messy and requires re-application. This seems like it might be a better application. Does anyone have any experience with this or heard of this products use in the aviation industry. FYI the videos are IMPRESSIVE and you should check them out I was impressed. http://www.ultraeverdrystore.com