I just built my first large project out of high quality (supposedly) 3/4 maple plywood. After I got the top built which is 18 x 76 including a 3 solid maple edging, and lightly sanded, I noticed some slight waviness in the plywood surface. Apparently I didnt notice that sheet of maple plywood had the waviness in it pieces from another sheet are fine.
I was planning on finishing the wood with General Finishes Satin Gel Topcoat. Is there anything I can do to smooth out the surface? The waviness is slight probably about 1/64. I doubt I could sand it out without going thru the veneer. Is there any clear finish, compatible with the oil based urethane finish, that would level it out like self leveling?
Any help or ideas would be greatly appreciated! Thanks.
Yeah---veneer core plywood. They don't make it like they used to ---or maybe I didn't used to notice. These days I usually buy "combination core" plywood in order to avoid that "waviness" issue (it has a layer of mdf under the hardwood veneer, so it is smoother and flatter).
I would try some judicious sanding, with a flat block, to help level out the ply. Then build up the finish. A liquid poly will build faster than a gel. Then you can rub out the finish as needed. A lower sheen will not highlight any residual waviness as much as a higher gloss. Good luck
I, too, think it's a risk. You could dado the shelves in, but only glue them on the back (or front, or maybe middle) 1/4 or so of the joint. That would leave the balance of the wood free to move. If...