the finish is several coats of polyurethane.

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<img src="b109_01s.jpg" border = 0>
<img src="b109_02s.jpg" border = 0>
<br>left pic shows walnut over padauk, right pic shows hard maple (backed by walnut) over obeche

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<img src="b109_07m.jpg" border = 0>
<br>from the left: hard maple (shown front-on in the top right pic), walnut, goncalo alves, padauk, walnut, hard maple veneer, purpleheart, osage orange, walnut, obeche, walnut, unknown, and walnut.

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