i've used Krown rustproofing for over 15 years. but the engine bay sures looks a mess cause of all the dirt sticks to the oil spray.
i saw this product advertised in a honda dealership yesterday:
symtech spray...
Sym-Tech > Traditional Rust Protection
symtech electric corrosion module...
Sym-Tech > Surface Rust Protection
i notice the Krown website includes the following disclaimer, retracting their prior criticsms of the electric corrosion modules:
"Krown has made prior claims concerning the Final Coat Electronic Rust Control Module, all of which are hereby retracted. In particular, Krown has circulated and posted on its website reports entitled "Comparative Testing of Electronic Modules for Rust Protection" dated March 3, 2008, and "Comparative Testing of CM-2000 Modules for Rust Protection", dated March 25, 2008. Krown acknowledges that these claims and the reports were based on faulty testing methodology. There is no basis for Krown to conclude that the Final Coat Module does not work."
i've also used the aircraft product ACF-50
ACF-50 - Pacific Corrosion Products
i like the Krown product cause it's nontacky. it drips on the driveway, but so does my porsche, merkur and kawasaki...
for some reason, the oil spray business is huge in canada and virtually nonexistant in the USA...