To make your own flour and water paste:[1] X Research source Add 1/2 a cup of flour and then a cup full of water. Mix until smooth. Create a thin paste that is about the consistency of double cream. Some recipe variants suggest adding one tablespoon of sugar to the mixture, though if you’re going to do this, make sure to use plain (all purpose) flour.
If using wallpaper paste, it will not stick to the plastic wrap.
This may take many days for drying but it is an important step to ensure that the bowl retains it shape, strength and is not at risk of getting mildew from poor drying. Keep testing with your finger during the drying stages to check for any moist spots.
If wished, apply a coat of emulsion and paint with acrylic paints.
