Found interesting paper about rendering glint: http://www.eecs.berkeley.edu/~lingqi/publications/paper_glints.pdf
Woul like to see such feature in Corona one day.
Being able to use detailed normal map with micro-detail would be really cool. The results in that paper look really great.
Don’t understand a thing but looks good 
The firt question that arises was… does it work for animation?.. And i found this video that explains it indeed does.
http://subtletv.com/baaaKmr/Siggraph_2014_Rendering_Glints_on_High-Resolution_Normal-Mapped_Specular_Surfac
Also pretty clever approach.
The car paint example in the video looks incredible!