I'm using a spray gun/cup HVLP system to spray a glossy acrylic pain on
wood, and for some reason the finish refuses to gloss. When spread with
a brush, it looks great, although with brush marks. Has anyone seen
this problem before? I'm about to apply a water-based urethane to try
to get the shiny finish if necessary.
Probably the same issue as with latex gloss paint. It naturally sprays
with less gloss than when applied with a brush. Nature of the beast.
I'd bet you aren't doing anything "wrong". Someone explained the
mechanism that dulls that type of paint when sprayed but I forgot. It
was a paint rep. that told me the details. It's NOT the typical "too
dry", "too far away" syndrome. Don't let 'em blame your technique.
It's a property of latex, and I'm betting it's a property of the
I was thinking that acrylic MIGHT be the same as latex, since I painted
a ceiling with acrylic ceiling paint. I didn't think it was that much
different. Latex DOES spray with less gloss than when brushed.
The paint I'm using is Sherwin-Williams "PROCLASSIC waterborne interior
acrylic gloss enamel". The can gives no recommendations on any sprayer
other than an airless system. I have diluted it with water to the
maximum viscosity that will still allow the siphon to operate and get a
decent rate of flow.
I wonder if it would help to dilute it further to get a higher
What does "not enough fluid" mean? And "dry spray"?
Thanks for more help on this! I hate to resort ot a clearcoat unless I
Latex requires a heavy duty dedicated HVLP system. I would say a
3 stage, 4stage preferred. If you are using a single stage rig,
you have diluted the stuff almost to water.
Gloss paint work requires a continuous full wet coat. It is an
art to apply a full wet coat without runs. A good automotive
painter earns his keep.
(top posted for your convenience)
Keep the whole world singing . . . .
DanG (remove the sevens)
Wow, I'm a handyman with a compressor and a cup HVLP sprayer, not a
crazy man with such a high-tech system! Perhaps it is impossible to
achieve a glossy sprayed surface with such a paint.
Is there another paint that will work with my sprayer that can achieve
a glossy finish?
Curious. I've sprayed latex enamel with a <$200 single stage turbine, similar
to what HF sells for about 80. I just used a large orifice/tip, and included
some latex flow additiive (which really made a difference). In colder temp
I'll add a little water, but only then. Have done this several times over
several years, with different brands. Results were smooth and glossy. Just
repainted and old arbor with similar results. Did anybody ask what size tip
What Dan said.
I have a 4 stage HVLP. The distributor claims it's ok to dilute up to
20% with water/Floetrol. seems reasonable to me, and it worked for me
with less dilution. Spraying latex with a weak HVLP system or the wrong
tip will not make it worth your time.
Very informative... thanks!
The diluted paint when spread with a brush is still shiny. I think the
trouble is in fact the paint being dried out in midair as it strikes
the surface giving it a sandpapery texture which diffuses light, spoils
the gloss. I'll try spraying with lower pressure and closer to the
work, and perhaps a top water-based urethane finish. And I will check
out that book.
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