Re: Polyurethane drying time?

["Al Hassick" <uncadoc-at-juno-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Jon.  I gave my form many coats of poly at two hour intervals until
the form was nearly perfectly smooth, I then sanded the form lightly with
220 grit sandpaper and applied a final coat of poly which I let sit for
several days, undisturbed.. The end result was a perfectly smooth form
with no wire ripples whatsoever.  It was like a sheet of glass.  I did
use a fan forced electric heater blowing across the form continuously
while I applied the coats, this made them dry successively faster as the
form gained heat.  The last and finish coat I let air dry without any
forced heat.  Al.

On Tue, 12 Sep 2000 07:56:54 -0600 "Tesla list" <tesla-at-pupman-dot-com>
writes:
> Original poster: "Jon Rosenstiel" <jonr-at-pacbell-dot-net> 
> 
> Hi,
> 
> I just finished putting a heavy coat of polyurethane on my new 
> secondary,
> (it's still turning in the winder). I see that it will need another 
> coat.
> >From past experience I know that the first coat will glaze, (looks 
> like a
> dry lake bed), if I apply the second coat before the first coat has
> thoroughly dried/hardened.
> 
> I want to avoid the "dried lake bed" look. How long do you guys 
> think I
> should allow  the poly to dry before I recoat it? I do know that 24 
> hours
> isn't long enough and that 6 months is more than long enough.
> 
> By the way, I live in southern California, daytime temperature 
> around 80F.
> (Good drying weather)
> 
> Thanks,
> 
> Jon
> 
> 
>