Here are the specs on the product.
Cortec VpCI-368 leaves a firm, wax-like film that can be removed by mineral spirits or alkaline cleaners . Typical applications include pipe coating, parts storage, underbody coating, wire rope, steel plate and machined parts. It protects carbon steel, stainless steel, copper, aluminum and cast iron. VpCI-368 may be applied by brushing or spraying. A film thickness of at least 2-3 mils is recommended for uncovered outdoor storage. Available in 5 gallon steel pails (Cortec Product Code 12300038) or 55 gallon metal drums (Cortec Product Code 12300039). 5 gallon drum weighs 50 pounds and ships under our standard shipping rates. The 55 gallon drum must be shipped by truck. We will provide you with a freight quote before we ship this product.
Features:
Flexible
Excellent salt spray protection
Excellent outdoor protection
Multimetal protection
Excellent UV resistance
Moisture displacing
Cured film is heat stable up to 392 degrees F (200 degrees C)
Conforms to MIL-PRF-16173E (Grades 1 and 2)
NATO 6850-66-132-5848
NATO 6850-66-132-6099
NSN 8030-00-062-6950
NSN 8030-00-231-2345
NSN 8030-00-244-1300
NSN 8030-01-470-2601
Trav has used it before with excellent results, it is not cheap. I've used similar products years ago, I got a little lazy with my Jeep and went with spray bombs of the HD Metal Protector. I have zero rust and think this product will be just fine over the Amsoil product.
I plan on spray applying it, with a conventional sprayer and a good rustproofing/undercoating gun using existing openings and access points. Two coats with one week dry time between coats, then annual inspections and touch ups. IIRC this product is used for aviation as well as marine use and should hold up quite well. I want a coating I can see through, and this fits the bill nicely.
I'll buy 5 gallons of it, and either sell some off to my brother, a friend, or use it up myself.
Edit: I have one of these to apply it with:
Professional Undercoating Gun
Item #19867 Brand: Eastwood