Retaining synthetic brush shape
So here's our synthetic brush (this only works on synthetics!)
He looks a little worse for ware, frayed etc. So we boil the kettle, stick the boiled water in a nice mug.
Dip the brush hair into the boiled water for around 10 seconds.
Leave to dry and voila, lovely and straight again with minimal stray hairs! It doesn't get paint stains out though, doh!