Very nice piece, Bernd. If you hadn't mentioned painting the edges I never would have known.
Concerning your wood, I live in a very rural location and the only access I have to a wood source locally is Lowes. Their quality of wood is very poor and I'm always having to deal with voids. Fortunately most of my projects are wall hangers and the edges are not a big issue however I am limited on the type projects I can cut. I'm still trying to build up my shop with wood working tools and my hope is to one day be able to resaw and plane my own material. Again, Lowes doesn't have much selection other than pine or popular. I guess they could special order such things as maple, walnut, cherry and other types.