After another beutifull spring day in Melbourne the paint actually cured properly
25C/77F the whole day and the paint is now rock hard!
Well that definitely solves the problem then.
Even my older painted piesces are good, painted some week or 2 ago.
Just need to find a warm place to "bake" the paint when it's coler.
Enamels are just fine with colder temps but apperantly not water based.
And no, Australian houses are cold inside when it's cold outside...