Re: [TCML] Polyurethane Finish Questions (update)

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

For water stains, I once had good luck in furniture using a blow dryer. I had some friends over years ago, and some of them weren't really house trained. They didn't use coasters and left numerous circular water stains, where their cold glasses were. After several weeks, I decided to try a hair blow dryer, and they completely disappeared.

I have no idea whether I was driving moisture out of the furniture, softening the finish, ??? All I know is that it worked one time. I don't know whether the finish was varnish, shellac, poly, etc.

Adam

--- On Wed, 4/22/09, G Hunter <dogbrain_39560@xxxxxxxxx> wrote:

> From: G Hunter <dogbrain_39560@xxxxxxxxx>
> Subject: Re: [TCML] Polyurethane Finish Questions (update)
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Wednesday, April 22, 2009, 9:54 PM
> 
> Thanks for all the useful responses.  I opted for
> mineral spirits and a clean shop cloth, which removed most
> of the dirt.  However, several water stains refused to
> come out.  This secondary (4" x 24", 28AWG) was on the
> floor of my garage during Katrina.  It has been in
> storage ever since.  It was in a plastic bag, which I
> thought was waterproof.  I was mistaken.  The
> water stains looked like s###.  (Me, looking
> disgruntled).
> 
> I wiped the thing again thoroughly with mineral spirits,
> gave it a fresh coat of oil-based clear gloss polyurethane,
> and went to the neighbor's for a long coffee break. 
> Went I got home, I mounted said secondary on my new SGTC
> pedestal, and excited it with two 9/60 NSTs and a sucker
> gap.  Sparks were disappointing, but it worked.  I
> replaced the little 4" drainpipe toroid with a monstrous 9"
> x 30" donut, and streamers went to 36" or so.  It needs
> finer tuning, and "k" needs tweaking.  Even so, I
> salvaged a neat-looking secondary, and got first light on my
> new coil.  Not a bad night's work!  Cool--I'm
> tired of Katrina taking things from me.
> 
> (Me, now looking gruntled),
> 
> Greg
> 
> 
> --- On Tue, 4/21/09, BunnyKiller <bunnikillr@xxxxxxx>
> wrote:
> 
> > From: BunnyKiller <bunnikillr@xxxxxxx>
> > Subject: Re: [TCML] Polyurethane Finish Questions
> > To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> > Date: Tuesday, April 21, 2009, 9:30 PM
> > Hey Greg...
> > 
> > for cleaning purposes, stick with a soft cloth and a
> mild
> > soap. any type 
> > of "solvent based" fluid will eventually dry out
> > the finish and create a 
> > dull sheen, or worse, remove the coating..
> > 
> > its really not the dielectric quality( i consider
> > dielectric factor more 
> > apt to capacitor usage)  of the coating you need
> but more
> > the insulative 
> > factor, protective layer, and visual
> > "prettyness"...  if metallic 
> > particles are infused in the coating, it may increase
> the
> > potental of 
> > secondary arcing...
> > 
> > Scot D
> > 
> > 
> > G Hunter wrote:
> > 
> > >What's the safest way to clean a secondary coil
> > coated with oil based polyurethane?  I have paint
> thinner
> > and also denatured alcohol on-hand.  Should I buy
> turpentine
> > or mineral spirits?  I don't want to ruin the
> glossy
> > finish.  I just want to clean off dust, dirt,
> and
> > fingerprints.
> > >
> > >I've also recently read that polyurethane oil
> > finishes may contain metallic drying agents, including
> zinc.
> > Metals in the varnish? Seriously? Why doesn't this
> ruin
> > the dielectric qualities of the cured poly?
> > >
> > >Cheers,
> > >
> > >Greg
> > >
> > >
> > >      
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> > >Tesla@xxxxxxxxxxxxxx
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> > >
> > >  
> > >
> > 
> > 
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> 
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