Putting deadening over the rustproofing will seriously diminish the effectiveness of any vibration damping.

 

What do you recommend i do?

 

Th deadening should seal out any moisture from underneath, I would personally deaden then rustproof.

 

Just to make sure I understand why do you want to rust proof your vehicle?

 

I live in Canada, it's pretty much standard up here.

 

The rustproofing I know of is oily stuff applied in a mist that covers all the surfaces it reaches. You would have to clean it off with a solvent where you want to stick anything to it. Stick deadener on first is my vote.

 

I have been curious myself about how to treat the cut areas on the mounting hole to prevent rust. Just paint will do it? or any special paint or primer needed for it?

 

The rustproofing im referring to is for preventing rust/corrosion caused mostly by the salt on the roads

 

There is a paint that chemically transforms rust into, well, a paintable non-rust-ness. For a fresh cut, a nice coat of rustoleum and I've never had a problem. On the outside, in nonvisible areas, I self etch prime, paint, then put bedliner over that (did this with my truck). As for your rustproofing, deaden first. It is highly unlikely for anything to rust sealed by deadener (keyword, sealed).

 

Thanks, Sirb00m


As far as the OP, I agree deadening the doors seals and prevents rust, the issue is having to put a layer on the inner door facing the outer door, and another layer over the inner door facing the door card.

Also on the outer door, some steel bars may be making it even harder to deaden.

When deadening, it is critical to not leave gaps or bubbles where water can rest, usually at edges and placing it over areas where those gaps and pockets can be created.

What I would do is, deaden the inner door and outer door as much as possible without leaving gaps and pockets for water to rest, then Rustoleum or bedliner coating over the inner door facing the panel and all areas not covered by deadener

Or deaden with the 25-40% rule and paint or coat over the areas not covered with deadener.