Nice onion skin! I keep sections of junk plywood and hardboard around just so I have spoilboard for any sized project. I tried to cut out some pieces as Steve suggested early on and ended up with some tear out…I think I left the skin a bit thick. Also, unless I’ve milled it to exact thickness, or it’s good quality ply, there’s always a little variance to the work piece thickness from point to point, which ends up giving me a variable thickness onion skin. I’m too impatient to dial it down, pass after pass, so I just use a sharp bit and go all the way into the spoilboard!

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".