Im not starting a debate just giving my
Every single sem product i have used has been top quality , that being said do your reasearch on how the specific product your using is designed to be topcoated with, and how.
I have used the sem high build on interior parts , and top coated with sem trim black .. Worked awesome.
If your using it on the body , be diligent with your research to make sure its compatable with your "paint system"
Most 1 part primers dont play nice with 2part paint ...
Good luck