That's an excellent suggestion, but I am afraid it leads me to two more
questions. First, will the original etching keep the tank from flash rusting
when you rinse it with water? I know the muriatic acid doesn't do that.
Second, how do I know which chemical in the coating is the base? The Hirsch
product lists the following ingredients:
Vinyl ResinTolueneMethyl Ethyl KetoneCycihexanoneXyleneWhat should I use for
the final wash?
> Date: Sat, 22 Sep 2007 07:53:56 -0400
> From: parkanzky@gmail.com
> To: jandkstone99@msn.com
> Subject: Re: [Shop-talk] Source (or alternative) for Phosphoric Acid
> CC: shop-talk@autox.team.net
>
> What we did when we coated a motorcycle tank was to prep the tank with
> the acid, then immediately flush it well with water and then whatever
> solvent is in the coating. The coating we used was acetone based, so
> we rinsed the tank out a couple times with acetone. That carries all
> the water off and leaves something that you know will be compatible
> with the coating. It also insures that you don't have water under the
> coating anywhere. It turned out pretty well for us. The only hiccup
> we had was that the tank was so badly rusted that when we treated it
> with the acid we actually opened up several pinholes. We had to be
> careful to keep the acetone off the paint when we rinsed out the tank,
> and the coating sealed the holes up.
>
> -Paul
>
> On 9/21/07, JAMES STONE <jandkstone99@msn.com> wrote:
> > Thanks guys! Great advice. However, I have to confess to now feeling
pretty
> > stupid about this message. As soon as suggestions starting coming in I
> > realized that I had never bothered to check Home Depot or Lowes; I
Googled
> > "Phosphoric Acid" without much success and just assumed that this would be
a
> > specialty product. After reading all of the readily available
suggestions, I
> > decided to stop at HD on the way home from work today. While there I
bought a
> > gallon of Kwik Strip Phosphoric Prep & Etch for $14. (Its not on the
ether
> > the HD or Kwik Strip websites, but here's a link to a place that sells it
even
> > cheaper:
> >
http://paint-and-supplies.hardwarestore.com/50-270-concrete-cleaners/phosphor
> > ic-plus-prep-and-etch-649831.aspx)
> >
> > Now, the only thing I need to decide is which directions to follow. For
rust
> > removal, it says to use full strength, then drain, air dry and paint
within 48
> > hours. For etching, it says dilute with 3 parts water, rinse after use,
and
> > paint within 48 hours. The Hirsch product, which looks like a diluted
version
> > of the Prep & Etch (although they smell different), says to use full
strength,
> > air dry and coat.
> >
> > My inclination is that if it can be painted without rinsing after full
> > strength use, it can be coated too. But, since I am not feeling
particularly
> > intelligent at the moment, I am open to suggestions.
> >
> > Thanks again,
> >
> > Jim
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