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Re: Newbie polyurethane mistake



Original poster: Karl Lindheimer <karl@xxxxxxxxxxxxxxx>

Hi Paul,

I also applied poly finish to my coil following the instructions you have. I did not have any trouble either. I think it depends upon the various formulations. I have also had the unfortunate experience of applying a finish, only to have everything 'crack' or 'craze' suddenly, and then all slump off in a big mess.

regards,

Karl

On Jun 29, 2005, at 4:22 PM, Tesla list wrote:

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

Tom,
I'm somewhat confused because the polyurethane I have says to apply additional coats within two hours, before it dries. It says to wait 48 hours, if you wait longer than 2 hours between coats. What kind of polyurethane are you using? It isn't the water based type, is it? I remember resurfacing a table top once and I know that I applied many coats of polyurethane spray without waiting more than 10 minutes between coats and I had no trouble at all. Regards.
Paul
Think Positive


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, June 27, 2005 11:58 PM
Subject: Newbie polyurethane mistake

> Original poster: "Coyle, Thomas M." <tcoyle@xxxxxxxxxxxxxxx>
>
> Having never worked with polyurethane before, I made what I'm sure is a
> super-newbie mistake, and I'm wondering if there's any way to rectify
> it.
>
> I coated my secondary with about 7 coats of polyurethane (until I
> couldn't feel the ridges of the turns). Unfortunately, I didn't let each
> coat fully dry before putting the next one down. Now, the outside is
> rock-solid, but if you press with a finger, the coating will buckle and
> peel. The bottom layers are still gelatinous, while the top is solid.
> It's been sitting for 6 weeks while I work on other things, and that
> inside just won't dry (if I pick off some of the top, it's still moist
> below). This would seem to be a great testament to how wonderful
> polyurethane is at sealing out (or in) moisture.
>
> Is there any way to salvage this secondary? Can poly be baked to finish
> curing? Will the gelatinous poly cause flashovers or some other
> nastiness? Has anyone ever made this mistake before (say yes - it'll
> make me feel better)?
>
> Thanks,
>
> Tom
>
>