Re: Cleaning old Apple II cards?

["atfphotography@gmail.com" <atfphotography@gmail.com>]

On Jun 21, 12:57 pm, "John B. Matthews" <nos...@nospam.invalid> wrote:
> In article
> <1f128bd0-c26a-42c0-95d5-62bb33e55...@h26g2000vbr.googlegroups.com>,
>
>  "atfphotogra...@gmail.com" <atfphotogra...@gmail.com> wrote:
> > On Jun 20, 8:33 pm, "John B. Matthews" <nos...@nospam.invalid> wrote:
> > > In article
> > > <6a9e3700-5b74-47f8-a2bb-22d2b50a7...@r16g2000vbn.googlegroups.com>,
>
> > >  "atfphotogra...@gmail.com" <atfphotogra...@gmail.com> wrote:
> > > > acetone?
>
> > > Definitely no. Acetone is too flammable, too toxic, and too good a
> > > solvent. It's altogether too dangerous, unless you're dissolving
> > > acetylene or removing nail polish.
>
> > Eeek.
>
> As Mike observed, I see you thought denatured alcohol might be acetone;
> and as larwe points out, denatured alcohol is simply ethanol that's been
> tainted with methanol (typically) to prevent diversion. Having less
> water than over-the-counter isopropanol, it may dry faster.
>
> <http://en.wikipedia.org/wiki/Denatured_alcohol>
>
> > Any suggestions then?
>
> I use nothing harsher than the dry brush attachment on my battery-
> operated mini-vac. Then I put the cleaned item in a box and use an
> emulator. :-)
>
> > Thanks for the warning!
>
> I have sometimes been surprised at what acetone dissolves. A plumber's
> spill of PVC adhesive was the most recent. From this I conclude that
> acetone shouldn't be discarded in a PVC drain (or anywhere else for that
> matter).
>
> I smoked during my Apple ][ days, and the high-tension wires inside my
> green & amber screens became coated with beard-like, fractal trellises
> of brown gunk. It's a toss-up which was more toxic: the lead or the
> filth.
>
> --
> John B. Matthews
> trashgod at gmail dot com
> <http://sites.google.com/site/drjohnbmatthews>

Hello,

Thanks for all the input. The idea for the denatured alcohol was from
this video;

http://tangentsoft.net/elec/movies/videos/tt05.mov

Click to the half-way point because he does half of it narrated with
no video. The second part is him using the denatured alcohol and
showing his process.

I acquired a Platinum IIe a few months ago from a fellow claiming
"great condition". HAH! It was rusting under the power supply, below
the motherboard and on small parts of the video connector and the
cassette port inputs on the motherboard. I sanded the case insides and
primed them and then sealed them. Nice grey look to it.

http://www.atfphotography.com/apple_rgb/content/apple_II_rgb_cards_2_june_10th_09_13_large.html

I was trying to figure out how to get the rust off Platinum
motherboard and that's when I came across that video. Would the
denatured alcohol process be good for something like a motherboard
with small bits of rust?

Thanks again for all the input,

Best!

ATF