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Old 03-30-2012, 10:13 PM   #1
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How to PREP Plywood for painting

Have 2 Door Jambs out of 3/4 AC Plywood...
Is there some sorta secret sauce on prepping plywood for painting.

In my only experience with painted plywood (which was a small window header in a bathroom), the paint cracked due to expansion/contraction


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Old 03-30-2012, 11:09 PM   #2
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Plywood door jambs- don't know if I've ever seen that. Is there side grain- layers exposed? Only thing I can think to bridge that kind of thing might be a real thick primer called peel bond.


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Old 03-30-2012, 11:16 PM   #3
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Actually, fwiw, I have 3 other doors in the same fashion. They may have been skim coated and then painted. They have help up well for 6 plus years.

Ply more stable to boot..

Since I'm doing a full repaint, etc with these new jambs, I want to get things right. I've actually sanded the paint down to bare wood on the existing jambs...

The casings are all exposed - no casing. Modern Detail. Jambs are Baltic Birch.
1/2-1/4" Z Frye Reglet Z Trim - 1 1/2 Jambs.
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Old 03-31-2012, 06:18 AM   #4
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If the surface is new, a good old sealer of 1:1 processed (not raw) lindseed oil and mineral spirits would be nice. Ask your paint store for their recommendation for a sealer/primer too though. You want to seal the wood grain so a a primer alone will not do the trick and will haunt you later.

The sequence remains:



Products come with two near components (e.g. sealer/primer or primer/underlay) but sometimes you are best off doing things separately.
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