[R-390] Polishing

Wed, 9 Apr 2003 01:13:08 -0400

The lights are still on in the "Yeah-But Dept.":

Yeah part:  Yeah, Jon, there's the MFP and there's the alodinine and
anodizing.  All are fairly tough to remove, though the alodining can be
removed by accident.  Anodizing is a bit more like plating and a somewhat
more durable.

The "but part":  While the MFP coating is fairly solvent resistant, it can
start to flake off due to a deteriorating bond -- particularly if coated
over raw un-alodined/anodized metal.  From the original post, it sounded
like this had already started.  Generally, to remove the rest of it,
abrasives are in order, or some kind of scraping action.  Either way, when
that MFP varnish flakes or is sanded, the particles can become airborne.

As a fix for either the MFP or alodining coming off, it might make more
sense to overcoat it with a tinted varnish or polyurethane to even out the
color and seal any MFP.  I haven't done this yet, but I do have some gear
with MFP that's flaking.  I think they still sell tinted polyurethane for
one-step wood finishing.  It should be possible to get a pretty good color
match.  Not sure how it stands up to heat, though.  Any recommendations from
someone who's been there, done that?

Barry

----- Original Message -----
From: "Jon & Valerie Oldenburg" <[email protected]>
To: <[email protected]>; <[email protected]>; <[email protected]>;
<[email protected]>
Sent: Wednesday, April 09, 2003 12:25 AM
Subject: Re: [R-390] Polishing

> Barry- MFP is a alcid varnish product using mercury compounds for the
fungal
> resistance. These varnishes are very solvent resistant,  and are evident
as
> a semi clear yellow tinted over coat on all components of  a treated
radio,
> most treated radios are stamped  "MFD"  in a diamond shape on the chassis
> after treatment.  Alodineing is a chemical process similar to anodizning
and
> is more likely to be damaged by accident, MFP is very tough to remove.
Jon
> AB9AH
> Central Daylight Time,
> > [email protected] writes:
> >
> > > From the "Yeah-But Department"
> > >
> > > YEAH, go ahead and remove the rest of it, BUT, be careful.  While
> virtually
> > > harmless when intact, that MFP stuff has some nasty ingredients, so
> we're
> > > told -- like maybe some mercury compounds and other things you should
> not
> > > breathe in or ingest even in trace amounts.  Don't use a wire brush or
> > > sanding wheel.  Keep it wet with cleaner so it doesn't go airborne.
> > >
> > > Anybody remember "mercurichrome"?  It was the lower-intensity,
> > > user-friendly
> > > alternative to iodine.  Technically speaking, I suppose none of us
> should
> > > be
> > > here. Could be many bad things got worse over the last half century --
> > > maybe
> > > one of those paradigm shifts.
> > >
> > > Barry
> > >
> >
> > Uh-Oh.........I certainly hope that none of you/us sniffed that "poison
> > sulphur" in the synthetic lubricants that we tend to
> > use.........arrrghhhhhhhhhhh............i can't
> > breath............ahhhhhhhhhh, ohhhhhhhhhh
> >
> >
> > Les
> >
> >
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