Anyway a tech tip to stay on topic.
I discovered that my water soluble dye had lifted some of my water soluble filler...duh..really..The remedy..about a teaspoonful of talc in a shellac suspension. A number of fairly thin local applications and the cracks are filled with no loss of colour..and importantly compatibilty with the clear coats to follow.
It beats stripping & starting again I can tell you.
Learning all the time :D
Robbo