I make a lot of picture frames for an artist friend of mine. I typically mill material to 5/8”-3/4” finished thickness. My rabbets are cut to accept 3/32” glass, mat, art, and 1/8” hardboard backer, plus enough room for everything to be secured with framing points. The one I’ve just started went awry - somehow Ive resawn my material right at 5/8”, which after lightly planing I’ll hopefully end up with 9/16”. This is really nice air dried quartersawn walnut from my “personal stash”. I’d hate to lose these pieces and throw them to the usable scrap stack. Is 9/16” too thin for a frame? This is a large frame, will be about 24”x30”. I always use miter keys as large as the frame width will allow. I’m behind schedule and I can’t wait for another slab from outside to acclimate to my shop for a few weeks. My other option is to go buy kiln dried walnut at $10+ bd/ft for 4/4. Also not guaranteed to find the quarter or rift sawn pieces I use for framing.