Here is a quick little plan for a scratch beader. Classic colonial furniture likes moldings, There are many different molding shapes available for modern routers and shapers. If you like old tools or like to make them, you may even have a selection of molding planes. When you come across a shape that you can't match, there is always the scratch beader, It is a relatively simple tool to make and if you have access to some tool steel, the scraper blades can be shaped to your requirements. Rude Osolnik touched on this in the Acorn Bed post, for fluting turnings.
A scratch beader is more labor intensive and your moldings will not be as perfect as the product from a router or shaper, but they will be much closer reproductions of the originals.
This article comes from John Nelson's book "Colonial Classics You Can Build Today", published by Stackpole Books in 1986.