As I start this posting, I'd like to save some people time. If you live in a dry climate and never see snow or salty roads then you might as well stop reading this now. Click your back button and save yourself some time reading useless information. I would not have done this if I lived in Southern California
For everyone else that DOES live in the Snow Belt and sees snowy/salty roads every year (even though this has been a very mild year) then keep reading because you might learn something.
I originally bought some clear POR 15 about 12 years ago. Can't really remember what I used it on. I think it was a car. Anyhow about 3 years ago I found the can in my shed. When I shook it, it still was in a liquid state. I proceeded to put some on my snow blower (it was summertime) and then forgot about it. I used it the next season and didn't think too much about it. Well the next spring when I put it away I was amazed at how well it had stopped the rusty area in its tracks. It (the can) sat around until I found it a few months ago. I noticed that my trailer hitch on my van was showing some good rusting starting to take place, so I used what was left in the can on it.
I then ordered a pint of black POR 15 to continue on, since the hitch was black too.
It arrived and I continued coating the trailer hitch. When I got under the van I was in SHOCK! You have to under stand; I have a 2000 Chevy Express van (bought Feb. 2001) which has NO rust on the outside body. It only has 40,000 miles on it and looks very very good. Now when I started crawling around underneath it, WOW look at all this rust! So I started coating the rustiest spots I could find.
Some where along the line I decided that maybe I should look under the Acadia. I noticed a few spots of rust starting to form on the trailer hitch so I dabbed a little on. Then I keep looking and found the exhaust pipes in front of the resonators looked rusty. So I started to coat them. Then the snowball, rolling downhill effect kicked in!
My Acadia is about 19 months old with 11,200 miles and has never really seen snow or salt. I lived with it in Reno, NV for about 12 months, then Las Vegas for about a month, then I returned to Michigan at the end of July last year. So you see, my vehicle has never been in snowy weather. Heck I have only driven it in the rain a couple of times. The point that I'm trying to make is that this vehicle should not have basically any rust on it yet.
Now to the real story at hand. Crawling around under the Acadia opened my eyes to the reason that so many cars are produced each year. Although the rust was nowhere near what the rust was on my van, it was like writing on the wall of what was to come.
Much of the aluminum was showing the start of corrosion, and rust was defiantly forming on many surfaces. This led me to the realization that I might be able to stop it NOW if I did something about it NOW. So I started to do a little testing of the POR 15 in different areas. It wasn't to long before I made the decision, that if I under coated it now I would stop rust from forming in the first place. Hence I began what turned in to a 2½ month project with about 60 hours of work. No I never planned on taking this long but one thing lead to another, and I still feel there is a little more to be done, however that will have to wait until summer of 2012.
Below I've tried to show what I did and why. I know (think) that very few of you if anyone would do what I did. However I tend to keep vehicles around and since this one hasn't given me any problems I felt it was worth trying. I did use both the black and silver versions of POR15. They do have a slight difference in consistency, so I decided to test their differences. I painted one half of the underside black and the other half silver. Time will tell which holds up better. Knowing what I know now I feel that I might be able to do the project in a long weekend. As some parts got painted twice or more because I changed my mind on what color the part should be.
When I previewed this posting I noticed the images were a little larger then I expected. Sorry
If you use the down arrow on your keyboard it will be a little easier to control the scrolling.
Now I feel better