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Old 02-12-2007, 05:39 PM   #1
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water base over oil base


as rule water based paint can never go over oil base paint?

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Old 02-12-2007, 06:40 PM   #2
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water base over oil base


From what I have learned by painting my front door without thinking about it being oil based that was on it, you should use a particular kind of primer that allows you to go over the oil based paint with latex. If you don't, it seems it will not adhere properly and you end up with the new paint peeling off.

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Old 02-12-2007, 08:05 PM   #3
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water base over oil base


You should also properly prep. the surface to be painted.

One way is to sand the oil painted surface to a 'dull' finish.

Use an oil-based primer that is suitable for such an application. After drying, apply your quality latex paint...
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Old 02-12-2007, 08:17 PM   #4
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Old 02-13-2007, 12:12 AM   #5
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water base over oil base


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Originally Posted by csvharvest View Post
as rule water based paint can never go over oil base paint?
NO, it's the other way around. Never go with oil over latex. But that rule is very old, going back to the homes primed with linseed oil primer and painted with latex.

With today's fomulas you can do just about anything.

In the case of the door where the paint is peeling, it's not due to the oil based paint itself. It's due to covering a gloss that hasn't been primed or sanded. That can happen with any paint, be it oil or latex.
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Old 02-13-2007, 08:30 AM   #6
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Thanks Joe!
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Old 03-01-2007, 07:12 PM   #7
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Originally Posted by joewho View Post
NO, it's the other way around. Never go with oil over latex. But that rule is very old, going back to the homes primed with linseed oil primer and painted with latex.

With today's fomulas you can do just about anything.

In the case of the door where the paint is peeling, it's not due to the oil based paint itself. It's due to covering a gloss that hasn't been primed or sanded. That can happen with any paint, be it oil or latex.
Every situation is different ,I can easily go with a flat oil over a high gloss latex without any adhesion problems.I can also go over oil with SOME latex paints ,There are exceptions to every rule but basically dont put latex over oil without extensive sanding or the proper primer(there are both latex and oil primers suitable for this)

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