Epoxy
 

SPI here as well!
Great product, fast shipping and excellent customer service!

I have used both DP and Shopline, I cant tell the difference. I now use the shopline as the epoxy coat when the car comes back from media blasting. then do bodywork and primer. Then use the shop line epoxy reduced 10% with acetone (as directed) for the sealer and I wet on wet the top coat. I will use a similar color epoxy sealer coat as the paint color to help with coverage.
but what do I know.
I have had issues in the past mixing products so I only use ppg now at least if there is an issue you may have an argument with the rep.