Refinishing Problem

[Greg Newell]

Terry,
    Perhaps this post was meant for me not someone named Mark. I am the one who
bought the Accuspray but it is the turbine unit not the conversion gun. The info
I got was that even a 3 1/2 hp compressor is not enough to drive a conversion
gun so I went with the turbine. I also plan to spray Latex paints thru it so
that was probably a factor. Anyway, Yes I have been using it and yes I suggest
thinner coats to eliminate orange peel. The info that came with the unit
suggests that orange peel is a direct result of too heavy a material flow. The
real question however is whether or not the lacquer flows out or not. If it
doesn't then you may have to start again. Please keep me posted as to how this
product works for you.

Greg

Farrell wrote:

> 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
> > >
> >

--
Greg Newell
Greg's Piano Forté
19270 Harlon Ave.
Lakewood, Ohio 44107
216-226-3791
mailto:gnewell@ameritech.net