You can laminate handrails by cutting strips of appropriate wood, milled square in cross section to the thickness of the rail, and cut to appropriate length. then glue the strips side by side working from center out to either side (I use CA) along the top edge of the bulwark until the desired width is achieved . you can vary the length of the strips in order to facilitate ease of positioning and glue set time. Vary the lengths if laid up in sections, so that you don't end up with a single butt end line across the width of the rail. The greatest care must be given in laying down the center piece (or couple of pieces) along the top of the bulwark as it defines the shape of the overall curve. I like mahogany as it tends to obscure the seams and crosscuts. Cherry, Pear, Boxwood, Walnut all look fine .The seams are irrelevant if sealed and painted. I find that no steaming is necessary using this technique as strips cut square in cross section usually bend right around a long gentle curve, If confronted with a tight curve, wet the wood with room temp water and bend using a drum head fitting on a soldering iron. This type of bending tool is available from Model Shipways(expo). You can re-wet and re-bend a strip or plank endlessly, using this tool, sculpting it to shape until you get it just right. You can even give the part a twist while bending it if necessary and it will hold it's shape with great precision.