There is a neutralizing solution that is used with Naval Jelly, it cost
about as much as the jelly.
Not related to Naval jelly are several phosphating washes that can
prohibit rust. I can't name them but I've seen them around.

Stan Wilder

On Sat, 24 Nov 2001 14:19:20 -1000 Ed Sato <edsato@JUNO.COM> writes:
> I don't know if I remember this right. But after using Naval Jelly
> the
> chemical needs to be washed off with water before painting. Anyway
> when
> washing bare metal (iron) with water a coat of rust will develop
> from the
> interaction of metal and water. This reaction is unnoticeable to
> the
> naked eye. After painting areas that was treated rust developed
> after a
> few years. That is one of the reasons cars of before always rusted
> on
> body worked areas.  Products such as osphos and other metal
> protectant
> products became more popular. They do not involve water and the
> chemical
> reacts with the rust that cannot be seen or cleaned to treat the
> metal
> before painting. Everyone feel free to trash me if I am wrong.
> Aloha, Ed
>