Refinishing Problem

[Farrell]

Hi Mark. I am spraying Oxford PSL for the first time. Lots of orange peel. I
wish I had read your post below from last January and tried to spray it a
bit thinner - I know my coats were going on just about as thick as I could
make them without running. Do you still suggest trying thinner coats to
minimize orange peel?

Are you still using your conversion AccuSpray gun? I am trying a Eco gravity
gun.

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com

----- Original Message -----
From: <bases-loaded@juno.com>
To: <pianotech@ptg.org>
Sent: Saturday, January 29, 2000 11:39 PM
Subject: Re: Refinishing Problem


> HI Terry -
>
> I have been using Enduro for some time now, and use an Accuspray gun, as
> well.  However, I use a compressor to power my gun instead of a turbine,
> so I use the so called "conversion" gun (Accuspray Model 10).
>
> At any rate, I have sprayed their Poly quite often, and have used the
> .043 nozzle with the # 9 cap, as you indicated.   I switched over to a #
> 7 cap about a year ago, for better atomization.  The differences are not
> dramatic, but they are tangible.
>
> I would recommend solving your problem this way:  definitely spray
> thinner coats.  It's visually more deceiving with the water-based than it
> was with the old nitro.  A proper coat tends to "look" like it needs more
> material, but it doesn't.  If you are applying coats that look really
> wet, then they are too heavy.  The only times I have had trouble with
> water-based stuff is when I got too heavy.  Also, you might try adding
> about 5% water to the finish.  This will help flow-out a bit.  They very
> well may have a flo-out additive, or a retarder of some type, but I have
> never needed it, so I'm not sure.
>
> I'm assuming, of course, that there is no problems with contaminants on
> the wood, and that there is an adequate mechanical bond available for the
> poly.  What are you spraying it onto?  A sealer?  Shellac?  Itself?  Poly
> can be finicky in what it adheres to, and how well.  In all likelihood,
> thinner coats will solve your problem.
>
> If you continue to have problems, you might try contacting Enduro, or go
> straight to Mark Ellis, their seminar guy.  He is quite knowledgeable
> about their products, and is very helpful.  You probably have Enduro's #.
>  Call them to see if they can help;  if you don't feel they are solving
> your problem, ask them for Mark's #.....  I'm sure he can coach you thru
> it.
>
> BTW, the last job I did I used a finish by Target Coatings called "Oxford
> Hybrid Varnish".  It's a water-based urethane that somehow includes a
> modified tung oil, and had the warmest look of any WB finish I have seen
> to date.  I sprayed it, but I am told that it brushes on like a dream.
> If you are at all interested, check out www.targetcoatings.com
>
> Mark Potter
> bases-loaded@juno.com
>
> On Sat, 29 Jan 2000 18:20:23 -0500 "Farrell" <mfarrel2@tampabay.rr.com>
> writes:
> > PianoTech Refinishers:
> >
> > I am looking for input from any of the refinishers in the group that
> > work
> > with water-base materials. I am having trouble with what I believe
> > is
> > commonly referred to as "orange peel".
> >
> > I am using Enduro polyurethane water-base hi-gloss clear-coat
> > (numerous
> > refinishers have indicated that it is the "best") with an Accuspray
> > spray
> > gun equipped with a #9 nozzle and a 0.043 tip (this is the
> > combination
> > recommended by Enduro for the product I am using). My sprayer is
> > supplied
> > with air by a 3-stage turbine. I am typically spraying with
> > atmospheric
> > conditions of about 80 degrees and 60% relative humidity.
> >
> > My understanding is that "orange peel" (my refinishing is coming out
> > looking
> > like the skin of a basketball - only finer grained - is this "orange
> > peel")
> > is caused by the material drying before it has sufficient time to
> > flow out.
> > It seems to me that 80 degrees is not too hot ( it is hard to get it
> > lower
> > in the summer), and 60% humidity is certainly not too dry. I am
> > spraying
> > within 6 - 8 inches from the object being sprayed. I am putting on
> > what I
> > think is enough material - it looks real wet and if I put any more
> > on it
> > will run (I know that for a fact!).
> >
> > What on earth am I doing wrong????? Anyone???? Any ideas?????
> > Help!!!!!!
> >
> > Terry Farrell
> > Piano Tuning & Service
> > Tampa, Florida
> > mfarrel2@tampabay.rr.com
> >
>