I’m using baltic birch plywood for a painted project, the top coat will be oil base paint, spray applied. In a few places the end grain will show and was curious as to how to prime the edge of the plywood to avoid the laminations from showing. I was leaning toward a vinyl sanding sealer, any thoughts out there?
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Wood filler, then fine sandpaper.
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
If you glue on some thin edge banding, you won't need to hide any laminations. Birch is a great wood for this because it has a tight grain, accepts paint and primer, is cheap and routs really well. It doesn't need to be any thicker than 1/8", but a little thicker is more forgiving.
Iron-on wood veneer edge banding.
Ply will always show cracks along the layers if painted. Fill it with whatever you want, as often as you like and they will still eventually show through. That's simply the way it is.
One way to solve the problem is to laminate a thin layer of fiberglass over the edge with epoxy. Edge banding would work if it's carefully applied and is paintable, but I'll bet on small cracks showing through the paint where the edge of the banding meets the top/bottom layer of ply.
Good luck,
Don
Bondo
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- Fyodor Dostoyevski
If you said whatthe project was I'm bettin' you get a better reply
Be more specific
andy
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thanks for the input guys, edge banding is out since the edge is curved and profiled. I'll post a photo of the section later today with more detail.
You don't need to rule out edge banding due to a profile. An edge band can be more than a thin strip, it can be an inch or more, if you want. Just rout it the way you would solid wood and make sure the jount is glued well. If you want to make sure the edge doesn't have a chance of loosening, cut a tongue on the edge that will fit into a groove on the shelf. Clamp it tight, scrape off any glue squeezeout and sand it smooth. I second the use of Bondo for filling. I haven't found anything that works better.
"I cut this piece four times and it's still too short."
Thanks guys for all the ideas. I settled for a take off on the bondo concept by mixing up a batch of catalyzed resin glue (unibond 800) and brushing it on the edges. The resin soaked into the end grain and the remaining glue sanded off fast and clean leaving a good base for the paint. I'll post picks of the project in the photo section as soon as it's completed.