Naval jelly was what I was trying to think of. I have had good luck with it
in the past.

Thanks for the tips.

On Sat, Jun 26, 2021 at 6:49 AM Thomas Casal <thomas.casal@gmail.com> wrote:

> There are a ton of rust converters on the market these days, ospho being
> the most recommended on thesamba from what I’ve read. I’ve used a bunch and
> bought a bunch. I have about 6 different rust converters in my garage.
> Skunk rust, marhyde, ospho, corroseal, por15 etc….Some are water based now
> like corroseal I think marhyde too. Water based are solid because they are
> foamy after you shake them and so they stick to the area a bit better than
> the acid based products for vertical seams or under body where the acid
> will run Off easier. I’ve had good luck with both, corroseal you can buy at
> the homedepot. I’ve been using marhyde this summer just cuz I have it, it’s
> a solid product they all are if you follow the instructions. I would only
> treat rusty spots with either water or acid based converters and then I
> would apply an epoxy primer and master series chassis paint over the
> converter then I’d apply waxoyle chassis wax and cavity oil in the
> cavities. That’s my plan for my chassis anyway. Scraping that crappy under
> coating that just traps moisture is the worst part of the job. Got mine
> mostly scrapped off. It’s like they were trying to make these vehicles rust
> out from the factory. One guy joked it was “VW’s factory rust enhancement
> process”. My two cents on the Rust battle.
>
>  One other route I forgot to mention is you can try the naval gelly that
> dissolves the rust too sold at the homedepot. that I haven’t used for the
> vanagon just rusty tools seems to work great. God speed.
>
> On Sat, Jun 26, 2021 at 3:01 AM John Rodgers <jrodgers113@gmail.com>
> wrote:
>
>> There is a product - phosphorus based I think - And available at home
>> Depot, that will convert rust into a chemical that protects from further
>> rusting. Can't remember what it is called. I used it many years ago on the
>> steel beam bumpers on a motorhome. It converted the rust, turning it black
>> and protected from further rusting. Painted it on, left it for a few
>> minutes, then washed it down with water. Finished as black, I never
>> bothered to paint it. I have some surface rust on my current van, and if I
>> can find this treatment, I plan to use it again. but my question is -
>> would
>> it be appropriate as an undercoat for repainting my van. I certainly
>> want to stop rust, BUT I wonder about the effects on paint.
>>
>> Has anyone else dealt with  this  stuff. It was very simple to use, but I
>> had my wonderments about its use before painting. Anyone? How did you deal
>> with surface rust before painting.
>>
>