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Old 02-04-2018, 01:21 PM
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Katie Black Katie Black is offline
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Birchwood prep

Hi, I just want to confirm that I have this correct.

Before painting on birchwood I need to seal it with a sealant on both sides..twice is best. Then I need to sand it down.

Next I need to apply a coat of primer, again twice is best.

Is this correct? Thanks a lot I appreciate it.
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Old 02-06-2018, 02:21 PM
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Zarathustra Zarathustra is offline
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Re: Birchwood prep

Assuming it's already sanded to a smooth flat finish, I would use something like PVA glue (the cheapest option at anyrate) to seal both sides, and then apply a primer like acrylic gesso or oil primer. You can sand between layers, or some people add marble dust, it depends how much texture you like. I use a bristle brush and leave the brush marks in to create tooth and texture, but it's all down to personal preference. Some people like a smooth mirror finish.

If I'm using acrylic gesso, I put down a diluted (with water) version first, let it dry and apply two more layers, putting down the thickest layer last. With an oil primer, I can usually get away with one coat, but if I do use two, I dilute the first coat with mineral spirits. The oil primer is more tricky because the brush marks flatten out when drying, so I have to wait about 15-20 minutes when it's still tacky, and put the texture back in with the bristle brush.

The acrylic gesso I use is semi-absorbent. It's a nice compromise and surface to work on. The oil primer doesn't absorb the oil paint, so it is very slick. The colours stay fresh, but it takes a little more getting use to. During the first layer, it is very easy to take a paper towel and wipe away the surface, which can be an added benefit.
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Old 02-06-2018, 07:11 PM
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Katie Black Katie Black is offline
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Re: Birchwood prep

Thanks very much, great advice I appreciate it..
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Old 02-07-2018, 05:23 AM
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Re: Birchwood prep

You're welcome.
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