Hi there!
I live in Canada, and while my roadster will be parked over the winter, it’s still gets exposed to moisture and rain.
I am the second owner and I am wondering which under coating is best for rustproofing.

Are commercial outfits better than old-fashioned linseed coatings done bye a private person in their garage?

My car does not seem to have the little holes drilled yet for spraying inside. I guess that’s what the commercial outfits do they do a little hole so they can spray inside areas, but I’m having a hard time with the idea of making holes in the car no matter how small.

I just wanted to see what everyone recommends for rust proofing the under side of their crossfires specially up here in Canada.

Thanks so much

 

So I'm not from Canada, but my father was. I'm originally from Michigan and we did get some harsh cold winters with plenty of salt. There likely will be different opinions on this. In my opinion, you want to avoid the rubberized coatings sprayed under the car. When cracks develop in that coating the moisture gets trapped between the coating and the body causing rust and significant hidden damage.

A must watch youtube video on it:

 

Wow, thank you for sharing.

I’m getting such conflicting advice, and I just want to do the right thing.

After that video I’m thinking that commercially prepared and recordings is not the way to go for the roadster.

 

Second on Toolman's post. Many ppl believe that an undercoating would protect your investment BUT unless the car is completely cleaned of oils/debris after assembly at the FACTORY (before taken out of the plant), there is a possibility that dirt/moisture will get into various places and not be seen until a very expensive repair is done (sealed in by the 'undercoating'). Of course a seller of these undercoating systems will chime the adulations of having it done.... Let the buyer beware!


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Fluid film or just drain oil. Do Not drill into the painted body.

 

Huh? What are you talking about?


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Browsing the forum came across this thread. I use a product called Rust Check (coat and protect) in a 350 gram rattle can. This product goes on kind of gooey, bubbles around the surface and then just "hangs" there like a gel. After a few months, I look at it and it still looks gooey, like I just applied it. I don't do the whole underside, just what I think are critical areas that might rust over time. It is made in Canada by "Rust Check Corp" in Mississauga Ontario. I use it to spot spray exposed steel areas, and fasteners. I also spray the fuel and brake lines especially where they are mounted in steel or rubber clips. I put a can or two on my Christmas list for the missus, that way I get it for FREE! I used to use a product called Jig A Loo, also one of my favorites. I have no affiliation with either of these companies.