Answer (1 of 4): If you mix water with regular oil paint it won't work. Oil and water don't mix. Try it and see, you will get a gooey mess. You can thin water mixable oils with water. But its not going to work as liquid white. Thinner will make it thinner but not like liquid white. What you need
How to start palette knife painting - Quora
What is wet-on-wet oil painting called? - Quora
Will oil paint melt on water? - Quora
How does one mix colors using just white and black for oil painting? - Quora
What is wet-on-wet oil painting called? - Quora
Is it good to mix oil colour with kerosene while painting? Or use it to wash my brushes? - Quora
Do you really need more than the primary colours, black and white for watercolour or gouache? - Quora
How do oil painters create or brush straight lines on a painting, given that the canvas surface is wet? - Quora
Best Liquid White Recipe - Easy and Safer!
How long does oil-based paint take to dry? - Quora
How to remove oil pastels from paper - Quora