Extender works by not allowing the paint to dry quickly, therefore giving you what’s known in the paint industry as “more open time”, which is more working time with the paint before it dries. Extender can help eliminate the appearance of brush strokes.
How to use Extender:
Mix 1/4 a bottle (15ml) – 1/2 a bottle of Extender (30ml) together with a pint. 1 bottle is good for to 2-4 pints. Adding more is not recommended as it will impact your drying and curing time.