1. What type of substrate are you spraying over?
OEM mild steel?
hard Plastic?
Fibreglass?
cast pot metal? etc?

2. What type of finish are you spraying the rattle can
(Centari acrylic enamel) over?

Is it Original OEM paint?
- if so what is the orignal paint, lacquer, enamel, single
stage bc/cc?
Is it After market primer?
- Acryllic lacquer primer
1K urethane
2K urethane etc..

3. Have you tried the rattle cans on something else?
(to rule out contaminants in the rattle cans)