cleaning/re-finishing limewashed natural plaster - how to make it shiny

It's been a while (14 years) since I did my limewash interior plaster, and I've generally just done some touch ups with my homemade lime wash when I felt things were getting dirty or ugly.  But what I'm seeing is that the new stuff goes on really 'chaulky', and doesn't really soak in and become part of the original.   Sometimes, that's not a big deal, if its up away from where one might touch it, but sometimes there's spots that are quite visible.

Now, it might be that some aspect of how often these spots have been touched is what has made them shiny and smoother, but that's also what makes them dirtier.  

Does anyone have any experience with getting new layers of lime wash to adhere to older layers, and/or how to get it to be shinier?  I remember talk of adding stuff to the lime wash, but I'm not going to do an experiment with dairy products or something, inside the house I'm living in-  I can't really have an experiment go bad.

I saw something that seemed to indicate painting with soap and water after the lime wash dried?? does that make any sense?

-    Ensure the existing limewash is properly cured and stable. If the limewash is powdery or chalky, you may need to address this with a damp cloth or by gently cleaning the surface.
-    remove loose paint and dust
-   Apply thin coats of limewash, allowing each coat to dry before applying the next.
-   Multiple thin coats of limewash may be necessary to achieve the desired opacity and color.
-   Avoid applying too much limewash, as this can lead to "lime bloom" (a white or powdery appearance) and may require reapplication.
-   Limewash can be refreshed or touched up by simply applying a new layer over the existing coat.
-   Misting the surface with water before and during limewash application can help to slow down the drying process and improve the bonding of the limewash.