There's an earlier thread on this but I thought everyone could benefit from a poll to generate some data on what everyone thinks on this subject. In the 90's, both our Civic & Prelude had to be retired due to rust from Canadian winters with road salt so when we got our new then 2005 Odyssey and 2003 Lexus GS, we started annual Krown (drip oil) rust proofing treatments that did an excellent job at preventing rust even after 13 & 15 years and but required holes to be drilled. Other cars of this vintage around here show rust but our Krowned cars have zero rust but are oily & gummed up everywhere and some swollen rubber seals. Given the high aluminum content, protection from the under car shrouding for aerodynamics, plus high voltage equipment & many electronic systems that could get affected by oil infiltration, I'm hesitant to Krown the Clarity. Aluminum doesn't technically rust but does corrode and is susceptible to Galvanic (dissimilar metal) corrosion. An aside but related, knowing about the galvanic corrosion risk & naive shop staff not used to aluminum cars, I'll need to ensure that any repair work done on the Clarity that the shop uses the appropriate Clarity specific insulating fasteners like bolts, grommets, seals etc to prevent direct contact of any other metals (steel) to aluminum. Beware of this new risk! https://www.popularmechanics.com/cars/trucks/reviews/a10399/how-ford-torture-tested-its-new-aluminum-f-150-16682803/ https://beranek.agrrmag.com/2017/07/galvanic-corrosion/ http://www.bodyshopbusiness.com/galvanic-corrosion-and-cross-contamination/ Rust proofing types: http://www.rtsauto.com/different-types-of-rust-proofing-undercoating-types-explained-which-to-avoid-and-which-to-use/ https://www.theglobeandmail.com/globe-drive/culture/commentary/should-you-buy-rust-proofing-for-your-car/article19839668/ I'll split the poll to account for those in the northern USA & Canada to experience salted roads and those in the south who enjoy salt-free driving. What will you do? Thoughts?