painting

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Old 01-30-01, 08:58 AM
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can someone explain/ describe the term "holdout", relative to paint and primer? the primer can advises against spot priming as it may affect the appearance (make uneven)after the final coat of paint due to different "holdout". what does that mean, what happens between the primer and paint?
 
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Old 01-30-01, 04:59 PM
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HOLD-OUT: The ability of a paint film to dry to its normal finish on a somewhat absorptive surface.

What the primer can means for example, if you spot prime bare sheetrock or wood the paint could turn out glossier or a deeper color on top of the spots primed than the rest, if you are scraping an exterior on a re-paint and want to spot prime just the bare spots thats ok, after the primer put one coat of paint on the primer then paint the house. I spot prime stains on already painted walls before re-painting and they turn out fine. Depending on what you are spot priming will determin if it is ok to spot prime.

Hope this helps.
 
 

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