Join Date: Mar 2011
Location: SEPA, Glen Mills
Car: Carmel Bronze Outback Premium 2.5 CVT
Feedback Score: 0 reviews
Just my 2cents worth; as has been stated rust is slow oxidation of the metal. Various methods counteract this action; sacrificial anodes( a piece of zinc), waxy coatings (Ziebart(US)), and other 'oily' coatings. A combination of anode and coating is maybe best. The crease between door skin and door frame is the prime area rust begins because the air molecule can't circulate and dry the area out(it's true, think rusted threads). So a sealant of a non-brittle coating encapsulates the crease so rust can't form(don't block drain holes). The anode protects but will need to be changed over time (so it must be accessible) The Techtol mentioned by Aussie Outback is new to me but on the Forester forum I found reference to Fluid Film a lanolin based product. Think wool, anyway in the states John Deere shops handle it, it is nearly as all-purpose as WD40. Either one should work.
As also stated it will depend on how long you plan to keep the car. Also it should be noted that chemical reactions accelerate with heat(rust is a reaction) so a heated garage with a car loaded with salt residue will begin to corrode faster.
The zinc can be zinc plumbers strap.
Carmel Bronze 2011 Outback Premium 2.5i CVT, 19mm RSB, OEM tweeters, BSM by SportWing, Llumar Air80 tint, OSRAM H7 65W.
Last edited by notwen; 05-03-2011 at 10:18 AM.
Reason: Additional info