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Discussion Starter #1
I have a small cabinet shop and for the last few years I've been painting the cabinets with PPG's Breakthrough! 250 VOC. I had good results and I liked the quick dry times.

However, the local PPG store was not able to endure the Pandemic and closed down. I recently tried Advance over 123 primer and got good results (very nice results).

However when I did a bathroom's worth of cabinets the other day (dark green) over Sealcoat I ended up with a texture on the MDF panels that give the appearance of painting over open-grain oak. All the grain is in a horizontal direction. The poplar parts of the shaker cabinet doors look fine. Just the center panel in 1/4" thick MDF has this texture.

I am going to sand this lightly today and apply some 123 and try again.

Any idea why I am getting this "grain" pattern?
 

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Discussion Starter #4
Sealcoat is shellac and would not normally cause problems with MDF. Usually, I find that MDF takes paint well, except in machined (milled) surfaces where it has to be sealed before using water-based paints. In the past I've used Sealcoat for that sealing.

Also, should I get a separate gun for primers? I am using HVLP 4-stage from Sprayfine and I am using the included 25-foot hose that came with the kit, and the factory supplied gun with a 1.3mm projector.
 

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Discussion Starter #6
Masterwork,

Thanks for the reply. The Advance is water-based and Zinser's 1-2-3 is also. So that is OK for one gun?
 

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I didnt realize seal coat was shellac. That would work. My only thought is if when you sanded you burned through it and let water from advanced get back there. If it was me I would sand it well. Spray some coverstain, and than lightly sand or not if not needed and spray advanced.
 

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Discussion Starter #9
Thanks everyone. I will put down some 1-2-3, lightly sand and re-spray with Advance.
 

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Discussion Starter #10
1WB.200 undercoater
Don't bother with 123. Use 046 or 1WB.200 undercoater, works great on MDF.
I just looked both of these up. The Duralac (1WB.200) says that all spray equipment must be 100% stainless steel. My cup is made from aluminum.

The 046 (Fresh Start) does not have that same warning. I called my dealer and they have it in stock. I will try that
 

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I just looked both of these up. The Duralac (1WB.200) says that all spray equipment must be 100% stainless steel. My cup is made from aluminum.

The 046 (Fresh Start) does not have that same warning. I called my dealer and they have it in stock. I will try that
Aluminum is fine, they mean opposed to some lacquer equipment that is regular steel
 

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I would spray the Advance with an airless. I have never had good results from an hvlp. Got any pics of your problem?
 

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Discussion Starter #14
I'm a cabinet maker. Unlike most painters, I don't need a large skill-set. I just have to know how to paint cabinets. Which I could do when I used PPG's Breakthrough! I only have the HVLP sprayer.

No pictures because I laid down some 1-2-3 and put down the first coat of Advance which looks fine. I will add a second coat today.

It seems that Advance does not like the shellac over MDF. It seemed fine over the poplar.

I don't like to have the first coat as a waterborne finish as it can raise the grain. So it seems like Sealcoat + primer + finish.

I use pre-finished (one side) plywood, so the interiors of my cabinets don't need to be finished. Just the exteriors.

I just recently added Euro-cabinets to my line. They have no face frames. I am still struggling to figure an efficient way to mask these. Most of the cabinets only need the narrow faces to be coated. The sides of most of these are hidden.

I also sell these unfinished, and the installer has them sprayed on-site.

At any rate, thanks for the assistance.

Forgot to mention. I was color-matching S-W "Shamrock" and I went over grey 1-2-3. I had a brand new can of this in the shop. I will try the Duralac WB.200 once this runs out.

Best Regards,

Packard
 

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I'm a cabinet maker. Unlike most painters, I don't need a large skill-set. I just have to know how to paint cabinets. Which I could do when I used PPG's Breakthrough! I only have the HVLP sprayer.

No pictures because I laid down some 1-2-3 and put down the first coat of Advance which looks fine. I will add a second coat today.

It seems that Advance does not like the shellac over MDF. It seemed fine over the poplar.

I don't like to have the first coat as a waterborne finish as it can raise the grain. So it seems like Sealcoat + primer + finish.

I use pre-finished (one side) plywood, so the interiors of my cabinets don't need to be finished. Just the exteriors.

I just recently added Euro-cabinets to my line. They have no face frames. I am still struggling to figure an efficient way to mask these. Most of the cabinets only need the narrow faces to be coated. The sides of most of these are hidden.

I also sell these unfinished, and the installer has them sprayed on-site.

At any rate, thanks for the assistance.

Forgot to mention. I was color-matching S-W "Shamrock" and I went over grey 1-2-3. I had a brand new can of this in the shop. I will try the Duralac WB.200 once this runs out.

Best Regards,

Packard
the duralaq primer doesn't really raise the grain on MDF and sprays great from hvlp unthinned
BM has a new paint similar to breakthrough available maybe sometime in the next months
 

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Discussion Starter #18
I will try to get to my Benjamin Moore dealer today. Using Durolac and skipping Sealcoat will save me quite a bit of labor.
Unthinned? I have to thin the Advance. I will try that. (I also have a 1.3 tip and 4-stage from Sprayfine. I don't know how much difference the manufacturer makes with these sprayers.)
 

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I will try to get to my Benjamin Moore dealer today. Using Durolac and skipping Sealcoat will save me quite a bit of labor.
Unthinned? I have to thin the Advance. I will try that. (I also have a 1.3 tip and 4-stage from Sprayfine. I don't know how much difference the manufacturer makes with these sprayers.)
Not sure other than the edge2plus gun is pressurized so its easier to spray thick material. The duralaq primer is very heavy (weight) but the viscosity is designed for spray application. do not attempt to brush the primer.
 

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Discussion Starter #20
I just looked up the Edge II Plus gun. At $504.00 (Amazon.com) it costs as much as my entire HVLP system cost. Is it really worth all that money?
 
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