Hi Russell,

Thanks for the info.  I recall some time ago there was a topic regarding
conformal coatings but did not think they would be suitable for my purposes=
..

As there is still corrosion, dirt etc in hard to get at places I was
thinking that a conformal coating would not halt the processes all ready at
play.

I had considered conformal coatings the goto product for new and pristine
electronics.

Where as these boards still have many components that are discoloured, have
layers of oxidisation that no amount of scrubbing seems to remove.  Without
removing every component (something I have considered but concerned more
damage would be done than good), and using abrasives and  acid and then
re-tinning etc.

So I had something in mind that would help penetrate and protect like
fisholine, rust converter, WD40, CRC or similar.

I have removed aged bolts that have been treated with neversieze and they
are like new and are good for old bolts so thought it might be ideal here.
Just wary.

A browse of the material that you supplied does seem positioned towards
protecting freshly manufactured gear.

I will continue to read thru the material.

Cheers Justin

On 5 August 2015 at 00:19, RussellMc <apptechnz@gmail.com> wrote:

> There are various conformal coatings available which can be sprayed brush=
ed
> or dipped.
> Generally a known name manufacturer and increasing price are indications =
of
> efficacy :-).
>
> Points to watch
>
> - Some will "wick" into crevices and may eg prevent pins making contact i=
n
> a socket.
>
> - Some are 'solder through' some are not.
>
> - Some can be easily removed in small sections for rework and a new porti=
on
> reapplied that bonds to the old.
>
> Some can be removed but not easily partially repaired.
>
> Some require an act of parliament and an angle grinder to remove and even
> then won't remove (two pots and more)
>
> Basic 'polyurethane spray on varnish' is quite a lot better than nothing =
at
> all but not as good as real & dearer stuff.
>
> Many smell good (to some people) DO NOT BREATHE THEM.  Xylene and misc
> other VOCs are the order of the day.
>
>
>
> Dow Corning
>
>   Many tutorials in rh margin
>
>
>
> http://www.dowcorning.com/content/etronics/etronicscoat/etronics_cc_tutor=
ial.asp
>
>
>
> https://www.dowcorning.com/content/electronics/electronicsproducts/confor=
mal-coatings-overview.aspx
>
> Dymax
>
>
> https://www.dymax.com/index.php/adhesives/electronics/conformal-coatings
>
> Electrolube
>
>               http://www.electrolube.com/products/conformal-coatings.html
>
> Pictures
>
>
>
> https://www.google.co.nz/search?q=3D%22conformal+coating%22&biw=3D1280&bi=
h=3D893&tbm=3Disch&tbo=3Du&source=3Duniv&sa=3DX&ved=3D0CFwQsARqFQoTCNiqoaTl=
j8cCFUN7pgodsr0AWQ
>
>
>
>
> Other
>
>
> http://www.mgchemicals.com/products/protective-coatings/conformal/
>
>              http://www.techspray.com/c-4-conformal-coatings.aspx
>
>              http://www.masterbond.com/industries/conformal-coatings
>
>
>
>                      Russell
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