The leading edge can be covered as is, resulting in a somewhat scalloped look, or it can be covered with aluminum or birch plywood sheet.
Here is one example of a wood covered leading edge. This is an Aerobat wing with fuel tank. Rib spacing is 12" and there are two nose ribs between each rib.
The end result is a light, smooth, strong (you can pound your fist on it without worrying about denting it) good looking leading edge that won't corrode.