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FREQUENTLY
ASKED QUESTIONS
- Do I need
fisheye killer? There have been no reported occurrences
of fisheye with PianoLac®. SS/BC/PF has a special property that
emulsifies minor contaminants. Should it ever fail, PianoLac®
Fisheye Killer can be used. SS/BC/PF doesn’t fisheye even if sprayed
directly over Pledge® furniture polish.
 
- Why spray
such thin coats? PianoLac is a high solids coating-much
higher than lacquer. Multiple thin coats build quickly.
Thick coats tend to trap air between layers, leading to pinholes, orange
peel and “witness lines.” Thick coats take a long time to dry
and cure. Thin coats can be re-coated sooner, and curing is much
faster.
 
- How long
should I wait to rub? Total hard cure of 9 coats can take
2 to 3 weeks. For a consistent high gloss, wait 2-3 weeks, unless
dehumidification is available. However, a rubbed satin can be
accomplished in as little as 3 day’s cure. PianoLac Black develops its
deep, black sheen only when it is hard cured. 2 to 3 weeks
 
- What about
going over other finishes? Reports from the field indicate
PianoLac can usually be sprayed over other coatings with good results.
If you want to experiment with this, follow these guidelines:
- Clean old
surfaces thoroughly with dilute solutions of citrus based or degreaser
type cleaners. Do all your touchups and sanding.
- Wipe and rinse
thoroughly.
- Spray 2 thin
coats of SS/BC/PF before spraying topcoat. This will
insure the best chance of adhesion and compatability.
- PianoLac
will look milky for at least an hour after applying over other finishes.
StarHawk Labs
does not promote or endorse the use of PianoLac coatings over other
finishes. The user assumes any and all risks involved in such
applications.
 
- Why do
I have to close out the pores with SS/BC/PF before spraying topcoat?
Open pores have to be filled with something. It’s far
better to fill them with filler and the PF in SS/BC/PF than with topcoats.
It will cure faster, rub out easier, and show no pinholes.
 
- Why shouldn’t
I sand between coats of SS/BC/PF? Sanding removes the
barrier coat you’re trying to build, opens up the possibility of grain
raising and pinholes and creates the risk of trapping white particles
between layers. On very porous woods, level sand the next to last
coat, tack off thoroughly with a damp cloth, then spray a thin coat
of SS/BC/PF.
 
- Why shouldn’t
I sand between coats of topcoat? It creates the risk of
trapping white particles between layers and is unnecessary for intercoat
adhesion. It wastes time and sandpaper.
 
- Why can’t
I use water as a rubbing lubricant? It creates a sort of orange
peel effect. Hard particles pile up on the paper causing scratches.
PianoLac RubCut oil cuts faster and glides over the surface.
 
- Can I use
oil based stain under PianoLac? Yes, if you wait overnight
before spraying the first coat of sealer.
 
- Can I make
toners with PianoLac? Yes. Use water soluble
dye concentrates such as Moser’s or Trans-Tint.
 
- Do I need
retarder to prevent blushing? No. PianoLac
is blush resistant. Only in cases where there is no air circulation
with 100% humidity will it blush. Simply leaving on a fan and
spraying thin coats will prevent blushing.
 
- How do
I make repairs? Most scratches simply rub out since
it’s hard to penetrate the surface. In case of a deep scratch
or gouge, replace the color with standard powders mixed in SS/BC/PF
and fill in with Ultra Thick PianoLac. Curing can be accelerated
with a hair dryer.
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