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MDF vs Ply vs MDO? Thickness?
CJK:
Yes, it's true: If you use a water-based paint on MDF, you'll be sorry. :)
That said, you can use it if you seal the MDF first with an oil-based primer. Make sure the paint you end up using is compatible with the primer, though.
-- Chris
jelwell:
Does anyone sell custom sized metal control panels? How hard is this to make at home?
Joseph Elwell.
danny_galaga:
--- Quote from: CJK on June 20, 2005, 10:10:50 am ---Yes, it's true: If you use a water-based paint on MDF, you'll be sorry.
--- End quote ---
armax:
I was wondering where everyone got the notion that water-based primers and paints act the same as water when it concerns damage to mdf...
it won't swell,warp or damage the mdf in any way. old wives' tale...
CJK:
Water-based primers and paints will cause MDF to swell; the amount of swelling depends on the amount of water absorbed. (And yes, water-based products behave like water because they contain ... WATER!) If you brush on the paint, you will get more swelling than if you spray, for instance. The effect may not be noticeable in your particular application, though, so a reasonable idea would be to test a scrap piece with the desired paint/finish. Also, some grades of MDF (yes, there are different grades) will be more absorbent than others.
If you want to paint your MDF cabinet with water-based latex, go right ahead. Just realize that you'll be spending some extra time sanding between coats to get the same finish you'd get if you used a solvent-based system instead.
-- Chris
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