Krown and Toyota's hydrids
A letter from Toyota
Please be sure that while talking with our technical services regarding application of an after market rust protection product on a Prius, we were advised that such a product is not recommended by Toyota Canada Inc. Application of rust protection could camouflage the high voltage orange cables, which would result in the electrocution of emergency personnel, the dealer or an independent repair shop if they unconsciously touch orange cables.
It remains your decision to add or not this type of product. Still, with the Prius, the company applying the protection should take more care as to not hide high voltage cables.
Also, damage or breakdown resulting from the application of such product would not be covered by the Toyota new car warranty.
Thank you for your time, etc