No, never. I've never tried it. My opinion is it is pine and it is goiing to blotch. Personally I've never had a real bad problem with the blotchiness. None of my customers have ever complained.Dave, do you ever use a conditioner, like a diluted shellac to help the blotching from happening?
Thanks Tom.There's no difference. The hardwood layer is peeled off the log like on a lathe, and that very thin sheet (like paper thin) goes onto the substrate which maybe Birch or Poplar. (Did I say this already? I'm in too many Woodworking Forums. :blink: )
I would still use the shellac as the first step after sanding. Since it's 1/4" or 1/8", I would hand sand with 220 or 320 very lightly prior to applying the shellac. Once you put on the shellac let it sit for 5 to 15 minutes then sand it with 320 or even 400 paper lightly. Then stain or finish as you would doing very light sanding when needed.
If you have a scrap piece, try it on that first to see if the color is what you want. That also gives you a way to test out the sanding process. It's almost impossible to replace a section of plywood when the hardwood skin comes off. BTDT and it's not fun.
Edit: Just curious... How are you planning to stick the Aspen plywood to the 3/4" Plywood, and what is the 3/4" plywood? (Cabinet Birch, AC grade, etc...)
I will use PL Contruction Adhesive or Nail Power Contruction Adhesive. I'll try the shellac.Will you use a contact cement or wood glue. If you use wood glue, spread it well and get the corners. Titebond I or III will do well. Contact Cement will work too but be sure it will resist the humidity.
As for the stain blotching... That's sometimes how the plywood reacts. The shellac will help that allot. Try another piece and shellac it first. Then apply the stain after 15 minutes. You'll see a difference.
Look for dewaxed shellac. (Waxed Shellac will not allow the stain to stick to it.) If you have a Woodcraft or a Rockler close by, get dewaxed shellac flakes from there as well as alcohol and some way to measure the fluid level and weight of the flakes. (I have an old food scale from the house and a plastic container from Home Depot with ounces marks on it. Blonde is the best color since it's transparent 97%. Mix up a 1 pound cut. (I think that's 1 ounce of flakes with 8oz of alcocol.) The flakes will need to dissolve overnight and it helps to crush the flakes prior to mixing them.
When the shellac is ready, sand the scrap to 220 or 320 noting what you sanded with. Apply the shellac to that area (A T-Shirt rag works well) and let it sit. After 5 to 15 minutes it'll be dry. Sand with 320 and apply the stain to see how it works.
Oak plywood & solid wood...
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