This board was flat after going through the drum sander. I got it wet a little to raise the grain and sand it. Brought it inside and referenced it off the granite counter and it wobbled just a little. I wiped both sides with a wet rag then placed a bunch of heavy stuff on it with the bow face up. A day later I take the weight off and it's flat and perfect.
Well......hours later I walk by the board and turn it over and the bow is back. Used a feeler gauge and it's about 5/64" gap in the middle.
How can get this bow out? I really don't want pass it through the drum sander on 60 grit for like 30 minutes. It would make the board too thin. It's already about 1".
I was thinking about soaking it mineral oil for a certain amount of time then using cauls and clamps and crank it down. Let it set for a few days and unclamp. As long as it stays oiled and doesnt dry out, should stay flat.
I read soaking in water works but the board has to be 100% dry before the clamps are taken off. That would take a few days.
rsz_unnamed.jpg