Anyone ever use POR-15?

[David Brady]

The use of any acid on spring steel can lead to hydrogen
embrittlement. This probably isn't an issue with most of the
undercarriage, but could be an issue with small springs and
clamps in the engine compartment.

http://en.wikipedia.org/wiki/Hydrogen_embrittlement

David Brady
'02 LXi, Smokey
NC

ebirder2000@... wrote:
>
>
> I have used POR-15 for several projects on the bus. It is an exceptional
> product that produces a hard glossy finish that is very chip resistant
> and easy
> to clean. BUT... in order to get the results that are possible from it
> requires a lot of preparatory work. All loose rust must be removed
> requiring scrappin
> g wire brushing etc. Then the metal preparatory solution, actually an
> acid
> etcher, needs to be applied, allowed to work and then thoroughly
> rinsed off in
> order to stop the acid action. The surface to be painted must be dry.
> Make
> sure that you wear gloves as POR -15 is difficult to remove from your
> skin.
> Your results will be great with if you follow the directions. POR 15
> is not an
> inexpensive product for large projects like an entire bus chassis.
>
> I have been painting/repainting the chassis of my bus small sections and
> have had good results from a product called Hammerite. The preparation
> process
> is far less complicated. I have been removing all the loose rust,
> cleaning all
> the grease and oil from the surface to be covered with solvents then
> brush
> painting it on. The product has shown excellent adherence to the
> chassis and
> has been holding up well. The acid etching process required for POR-15
> is not
> required. The best part is that Hammerite costs about one forth as
> much as
> POR-15.
>
> I am not suggesting that Hammerite is a better product than POR-15. In
> fact
> it is not. But to be practical, if you are repainting an entire
> chassis as it
> sits, that is, with the all the electrical, wiring, hoses and accessories
> still attached, and are working under the bus. Then acid etching and
> complete
> rust removal is not possible. I recommend the less expensive, easier
> route. I
> think you will probably be satisfied with the results.
>
> Steve Anderson
> 79 FC 35
> Poulsbo, Wa.
>
>
> In a message dated 7/21/2007 6:08:13 PM Pacific Daylight Time,
> sforman@... writes:
>
> Seems like a good product in design, wondering if it works. Wanting to
> address surface oxidation under my bus. Anyone use it or know another
> better product?
>
> Scott Forman
> 86 PT38
> With a cruddy underside
>
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