I just bought the POR-15 "starter kit" and their process is wire
brush to remove the loose flaking rust, clean with "Marine Clean"
basically just a strong degreaser, prep with "Metal Ready" then apply
the POR-15.  The "starter kit" includes small containers of all those.

I used it on the frame under the strut rod bushings before I replaced
mine.  Though there's remarkably little rust on the undercarriage of
my van in general, there was some rust under the old bushings and so
I cleaned it up and POR-treated it as well as the two "dish" shaped
metal plates that clamp the bushings.

A lot of jobs I do sometimes get extended for hours or even days as I
get off on tangents like that, but what the heck I get to know the
van a little better if nothing else.

Allan
--
1991 Vanagon GL

On Jan 11, 2008, at 11:09 PM, Scott Daniel - Shazam wrote:

> I don't think that product is junk, hardly.
> I am nutty about stopping rust, and I'd say preparing the surface is
> extremely important.
> I like to treat rusty metal first with 'rust
> prep' ............Osphro is a
> famous one.
> I use 'loctite Extend Rust Neutralizer'.........produces like these
> turn
> rust to primered metal.
> Of course you get all the loose stuff off first.  I just use a wire
> brush
> basically, either a power wire wheel or a small hand wire brush.
>
> Conditions matter too.........high humidity and low temps are not
> good.
> Getting it really down in there is a task too, like deep in cracks.
> But I bet if you prep it really well, use a surface etching or
> 'turns it to
> primer' product first, or whatever POR recommends ( I think they
> have their
> own product to do that ) ............and get 'all' rust spots way
> down in
> the seems, and work in dry warm conditions...........it'll be on there
> forever.
> Darn, my POR Brochure is not at my fingertips, but I'm sure it's
> not 'junk'
> .  You do need to use anything like that properly.   I would expect
> something to be applied before the POR paint to prep the surface more.
> Getting the product to bond  with the rusty metal, rather than just
> cover
> it, is the goal.
> Scott
> www.turbovans.com
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> Behalf Of
> Larry Himli
> Sent: Friday, January 11, 2008 3:43 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Seam Rust & POR
>
> I don't want to start another thread but recently there was one
> regarding
> seam rust.  Some of you were pretty vocal that POR was junk!
> Previously I
> didn't pay much attention because it wasn't a problem for me.
> However,
> several years ago when the subject came up consensus was that POR
> was a
> miracle for this problem.  I bought some of the materials and was
> planning
> to fix several spots in the near future.  Should I or shouldn't eye.
>
>
>
> Larry
>
> 87 Westy
>