Crackle Colours were developed at the request of professional decorators. They are simple to use and give a result after only a few minutes. Use as a base the Hobby Acryl or standard Acryl colours. Spray one even thick layer on the surface and after a few minutes you will see the paint to start to crackle. Chrome & Mirrorspray: can be used to obtain a chrome or mirror effect on almost all hard (dark) and very smooth surfaces. Blackboard Ideal for blackboards, menu boards and scoreboards. Use Hobby Acryl black 610 as primer. Spray at least 2 layers for the best covering. Nonreflective and hardwearing.