CDC4.0

I'm debating whether or not to under coat my mustang this season.
It's a 2006 and has typical surface rust for a ten year old car. Underbody is in great shape otherwise.
I have been toying with the idea of spraying the sub frame and frame rails with some rust paint as well as possibly getting it oil sprayed.
Any recommendations on brands / strategies?
I'm up in Canada, the land of salted roads, but the car isn't winter driven. It will see rain and wet roads in the summer though, its a DD not a garage queen but I still want to protect it the best I can.

Goldenpony

Everything I see recommends NOT to undercoat your car.

proeagles

The bodies are dipped in a solution to protect the car from rust when they are painted. There shouldn't be any rust on the body. The differential on the other hand comes rusted from the factory!

cavediver

Never! Undercoating will trap moisture and cause more coorosion, not less. New vehicles don't require undercoating. All those undercoating companies that used to be around like Zeibart and such are long gone thanks to better paints and primers. Just keep the underside rinsed clean and you will be far better off.

P51C

You are from Ontario, the land of salted roads. 5 year old cars there look like 25 year old cars out here on the left coast.

That said, you don't drive it in the winter so, the advice you've been given is fine. Undercoating is really chip guard more than rust protection. It just adds weight and makes a big mess for working on the car.

The steel in modern cars is galvanized and/or dipped before priming and painting. Cars just don't rust anymore, unless those coatings are penetrated.

CDC4.0

So even if the under side is displaying surface rust stay away from underbody rust sprays...I mean hey I don't mind saving the money lol

Thanks everyone

07 Stang

That surface rust helps protect from salt and other contaminants.

roadpilot

'Grace' is stored from OCT to APR, so ... no salt for her!