I decided to go ahead and add a bit of recurve to the limbs of this mulberry flatbow. I gave the edges a serious radius and applied a coat of spar urethane to the upper half of the limb. I steamed the limb for 30 minutes and into the caul/form it went. The limb was pressed down to the appropriate spot and clamped to cool. I was only looking for about 45 degrees of bend in this.
I don’t usually apply anything to the limb before steaming. I thought I would see if this made any difference because this is what Gary Davis does before steaming his staves. I was just looking for more data.