FreeForm Pro can be used to achieve this effect. You can displace your animated paint layer in 3D space. This will enable you to use Lights and have control over the texture of the paint, also you can use a rflection map for more realism. To create a displacement map you can comp a duplicate of your animated paint layer over black, use a Hue/Saturation effect to crush all color to white and a Matte Choker to feather the edge - you may need to add a soft blur as well. Precomp and use as a displacement map in the FF Pro plugin- this will give you the bevel you need for the paint layer.
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.