If your board is thin and cupped you can take most of the cup out with an iron and finish it off with a plane. This is way you remove as little material as necessary
Thanks a lot for posting this! How thick do you wager the board may be? I have some 14mm white oak boards that just don’t want to stay flat. it would be great if I get them flat even temporarily for cutting dovetails. They are laminated, though.
Mine was 6mm, but you can flatten out 14mm just as easily. If it doesn’t want to stay flat it never will, but temporarily it will. Just act on it straightaway
Journeyman's Journal 
Thanks a lot for posting this! How thick do you wager the board may be? I have some 14mm white oak boards that just don’t want to stay flat. it would be great if I get them flat even temporarily for cutting dovetails. They are laminated, though.
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Mine was 6mm, but you can flatten out 14mm just as easily. If it doesn’t want to stay flat it never will, but temporarily it will. Just act on it straightaway
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