Chipp Walters walks through how to create a great chipped paint effect for the Eevee viewport renderer in Blender 2.8.
Creating materials and shaders to work with real-time render engines is a bit of a different method than to create ones for traditional renderers. If you are producing materials and looks for Blender 2.8 Eevee, you should take a look at the tutorials that Chipp Walters is creating. Chipp’s latest has a look into creating a chipped paint effect for Eevee.
Walters walks through the setup that uses the free version of the Blender Addon, KIT OPS. It also makes use of a free KPACKS for both chipped paint and bevel effect. You can download the KPACKS here. Or if you already have the Definitely EEVEE Materials System, it’s included with it. Just update your files.