I revised my mix at the start of this thread.
Pour 100ml of white acrylic craft paint, (cheap at any dollar store or walmart) into a container after mixing very well. Non toxic and cleans up very easy with water
Then in another container put in 25ml water
Now mix in 2 1/4 teaspoons (us) titanium dioxide and mix very well.
While stirring the paint, slowly add the water and TI02 mix.
after that I used a 3D printed mini paint mixer from thingiverse to mix very well.
I use a 1.5 inch foam brush and it flows out and smooths the thicker areas.