Thanks to the versatility of Metallics, you will be able to add some shine to your dull office or to life at school. Decorate your daily companions, such as coffee mugs, smartphone cases and organisers, and kick-start your shining career in your own style.Setting Metallics on plastic Unfortunately, drawings on items such as smartphone cases made of plastic can't be set in an oven to make them waterproof. To ensure that your design can withstand daily use despite this, we recommend you protect the colour with clear, fast-drying acrylic resin varnish. Try it out on an inconspicuous part of the item first.