When it was freezing a couple of weeks ago I left my 25 liter tub of white emulsion outside. I needed to use it stupid I know so it had a head on and I tried to mix it but it just went lumpy. After bringing it inside and leaving it for a few days it has gone resonaabley ok but has go some lumps in. HAs anyone ever sived there paint to get the lumps out. Bit of a mad wuestion but has to be asked lol ?