I'm totally confused

[JCLP]

I don't spray often, well almost never.  But that looks like orange peel to my eye.

Which usually means the paint hasn't been thinned enough. 

But that doesn't explain why the other one goes down fine.  [unsure]

Both colours are thinned by 10% with benjamin moore extender. I have tried water and I get the same results for both. I would think that the grey would be thicker as it has more colorant in it. Make sense?

JC

 

[Pnw painter]

Are all the panels built out of the same material?

Does the large panel look good right after you've finished spraying it or does it look gritty?

I'm wondering if the Regal Select is reacting to the substrate or primer. What initial prep was done? What primer did you use? I don't think this has been discussed yet?

Sent from my iPhone using Tapatalk

 

[JCLP]

Are all the panels built out of the same material?

Does the large panel look good right after you've finished spraying it or does it look gritty?

I'm wondering if the Regal Select is reacting to the substrate or primer. What initial prep was done? What primer did you use? I don't think this has been discussed yet?

Sent from my iPhone using Tapatalk

Both panels were prepared the same. Two coats of Sherwin Williams wall & wood primer. Sanded 320 between coats. When I spray the Grey colour, you can see the wet look start to happen after about 30 seconds of laying it down. The White, goes on lumpy and dries gritty. I would think the white would be thinner then the grey due to less colorant. But I could be wrong.
I just sprayed a test panel with white and thinned it with 10% Extender, as before, but added 10% distilled water. It when on nice, after 15 minutes there was no visible lumps or grit. It leaves me to believe that the additional colorants in the grey must condition the paint more then the white. Here are the formulas for both.

White Dove - OC17
Y3 Ox 3.000  ( Oxide yellow )
S2 Ox 18.500 ( Gray )

Stone Harbor - 2111-50
S1 Ox 20.000  ( Black )
R3 Ox 25.500  ( Oxide red )
G1 1X 4.000  ( Thalo green )

Cheers,
JC

 

[wptski]

JCLP:

Maybe just wrong wording but Extenders slow the drying process but don't thin as the additional water would.

 

[JCLP]

JCLP:

Maybe just wrong wording but Extenders slow the drying process but don't thin as the additional water would.

Hi Bill,

Looks like your on to something. The extender in the grey colour works great with no additional water.
Attached is a photo of the white with 10% Extender and 10% water. I'm going to try just 10% water and see what happens.

The colour in the photo is a little messed up, but no lumps or grit. I can see the light at the end of the tunnel.

Cheers,
JC

 

[Bob Wolfe]

I would say that to compare the two paints, you have to start with a viscosity reading on both paints.  If viscosity is the same then the paint chemistry is different. That is a different problem with different solutions.
I  start with a viscosity reading, tells me what needles to use and where to set the air.
I use a Graco 9.5 turbine with Graco and Accuspray guns.

BW

 

[antss]

You might try spraying the white with a 2.0mm tip.

 

[QuailRider43]

Agree with above.  Extender helps level out the paint after it's laid down (slows drying), water thins the paint allowing for proper atomization through the gun.  You will usually need to add both when spraying acrylic latex.  Also, 1.5 mm tip is too small for acrylic latex.  Tip >2 mm is generally recommended for latex.  Pressure pots, bottom feed guns etc have slightly different tip recommendations.  Primers use 1.5 mm - 1.8 mm (depending on type), and clear coats generally 1.3 - 1.5 mm.  Lots of variables with HVLP.  I found this book very helpful:  Spray Finishing Made Simple by Jeff Jewitt.

 

[JCLP]

Agree with above.  Extender helps level out the paint after it's laid down (slows drying), water thins the paint allowing for proper atomization through the gun.  You will usually need to add both when spraying acrylic latex.  Also, 1.5 mm tip is too small for acrylic latex.  Tip >2 mm is generally recommended for latex.  Pressure pots, bottom feed guns etc have slightly different tip recommendations.  Primers use 1.5 mm - 1.8 mm (depending on type), and clear coats generally 1.3 - 1.5 mm.  Lots of variables with HVLP.  I found this book very helpful:  Spray Finishing Made Simple by Jeff Jewitt.

Thank you for this. I was trying to lay down a thin coat with a 1.3 needle and kept getting fish eyes. I just sprayed a test panel with a 1.8 needle and it went down great, no fish eyes or grit. I guess this paint doesn't like getting squeezed through a small orifice. Should know in about 2 hours how it turned out. Stay tuned.

JC

 

[antss]

I thought that was common knowledge.  [unsure]

 

[JCLP]

Damm. Nothing is working. Can't get a good finish.
I would use other words to describe how I feel, but I think I would be kicked off the FOG.

JC

 

[antss]

I feel your pain.  It's frustrating just following along.

What is the current setup that seems worse than all the others ?  Is the same issue happening or is it a different dried finish this go ?

I think you're at:
10% water
1.8mm tip

-Have you take a viscosity reading of both colors ?
-Have you tried thinning the paint more ? maybe 15% ?
-Have you acquired a 2mm tip ? Or even a larger one!

I'd try thinning a bit more with the same 1.8mm tip ?