Duplicolor ceramic engine paint issues

Not sure if you got some bad batches of ceramic paint. Get mine at O'Reilly's, they have all the mopar engine colors. Good quality control, good finishes. They rotate their stock.

Wonder if it is the Aerosol primer? Never cared for it, seems to be sub par in durability and chemical resistance, compared to the real professional grade automotive primer surfacers.

You want the Primer Surfacer (Sprayed from a Gun) to go on and dry the recommend time. It is the foundation for the topcoat.

Thinking your ceramic topcoat chemicals are going into the Aerosol Primer not being able to hold up the shine of the topcoat.

What does the gloss of the Ceramic high temp engine paint look like after you spray it on smooth bare steel, like stripped bare steel valve covers without using the aerosol primer underneath it? It should produce a gloss finish this way.

I would never use any aerosol primers under any auto body paint jobs, it can lift off from the the next chemicals going on top, making a mess out of an expensive paint job. Adhesion is poor too.

Aerosol primers are for the DIYers repainting their rusted lawn furniture.

Speaking from 12 years in the auto body and paint trade.

Anything that can go wrong will go wrong, and if you shortcut it, it's redo time.

Good luck, hope you can come up with a working solution.