Originally Posted by jyaan
There's really no need to buy water-miscible paints as far as I can see. You can already clean normal paint out of brushes with soap and water as it is. I mix a little soap into the tuft, rinse and repeat until clean.
Water mixable oils dissolve in water, regular oils don't. This means that you can thin them with water, you can't do that with regular oils.
While working with them you can clean out your brushes with only water, this can't be done with regular oils, and when you are done painting you can clean up brushes, palettes, and all else with only water.
Soap alone helps to clean out regular oils from brushes etc, but it is far easier and more thoroughly done with only water if using water mixable oils. It is far more difficult to clean out brushes as thoroughly with regular oils and soap and water. After scrubbing and scrubbing them forcefully, there will still be residual paint left up near the ferrule, which is bad for your brushes.
Water mixable paints,varnishes, glues, coatings, and lubricants are now being made in water mixable form which proves to be very helpful in a great many applications.
Iíve never used water mixables; are they interchangeable with regular oils?
Yes, all are 100% compatible and mixable together.