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Old 11-06-2019, 12:36 AM   #1
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Default High Gloss MDF panels- Help!

Need a high gloss lacquer appearance on some MDF panels but HO requested all WB products so the OB enamel Iíd usually use is out...

Theyíll be installed inset & flush to the hallway walls so not as concerned about change in durability but I KEEP burning through during wet sand between coats.

Iíve tried lowering my pressure/increasing mil, sandwiching layers of primer, & switching to basic water n dish soap from compound sanding...nothing seems to stop it. Am beyond frustrated...Advice?
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Old 11-06-2019, 01:38 AM   #2
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What primer and finish are you using?
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Old 11-07-2019, 10:54 PM   #3
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Primer is SW premium wall & wood (for high solid build over the MDF pores).

Finish coating w/ Advance Alkyd High Gloss
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Old 11-08-2019, 01:54 PM   #4
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Why are you having to wet sand so much between coats? Iím guessing the SW Premium Wall and Wood isnít smooth enough when youíve finished sanding it?

Iíd try switching to a different primer thatís easier to sand. Iíve had the best results with Lenmarís Duralac water based primer. It easily sands to a powder. If you use 400 or finer grit I think you find that you can produce one of the smoothest surfaces youíve ever been able to achieve.






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Old 11-08-2019, 06:01 PM   #5
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Primer: 1WB.200 fast dry, high build and very easy sand. Works great on MDF. Inexpensive ~$20/gallon. Comes white, clear, and can be used under most waterborne finishes.

Top: Advance Highgloss or lenmar 1wb.209 Highgloss.
The 1WB.209 is a true highgloss and less prone to showing sanding marks as advance. Clear and tintable while only though. Spray only.
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Old 11-09-2019, 01:34 AM   #6
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@PPD I think you may be burning through the Advance because it is not fully cured. I would try one of the pigmented wb lacquers or 250 voc Breakthrough. I use General finishes white poly and it wet sands like a dream. 600, 800, 1000, 1200 then Meguairs #2 car polish.
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Old 11-13-2019, 08:50 PM   #7
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Originally Posted by cocomonkeynuts View Post
Primer: 1WB.200 fast dry, high build and very easy sand. Works great on MDF. Inexpensive ~$20/gallon. Comes white, clear, and can be used under most waterborne finishes.

Top: Advance Highgloss or lenmar 1wb.209 Highgloss.
The 1WB.209 is a true highgloss and less prone to showing sanding marks as advance. Clear and tintable while only though. Spray only.


I hadnít considered duralaq- will look into that! Should my BM be able to provide it if I call in an order?
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Old 11-14-2019, 12:21 AM   #8
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I hadnít considered duralaq- will look into that! Should my BM be able to provide it if I call in an order?

Yes I believe the oakland warehouse stocks that product in high gloss.
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Old 11-14-2019, 12:06 PM   #9
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I hadn’t considered duralaq- will look into that! Should my BM be able to provide it if I call in an order?

I just checked and oakland warehouse does stock that item. Both 1wb.200 undercoater and 1wb.209 white high gloss.
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Old 11-14-2019, 12:59 PM   #10
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I just checked and oakland warehouse does stock that item. Both 1wb.200 undercoater and 1wb.209 white high gloss.


Awesome- thanks! Iíll call it in this morning
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