Some Info About Painting With Enamel.

The sprays for vynil and plastic such as SEM products are laquer based or alcohol based. They dry almost instantly. Their clean and prep solvent is about the same chemical as pvc pipe cleaner. It leaves the surface tacky.
Krylon claims their newest spray bonds to plastic at the molecular level. Thats plabably true only if the surrface is stripped to raw plastic.
If a plastic bezel is stripped and rechromed, then detail painted, the paint will scratch off. Solution, dont scratch it. Most shops who restore these bezels wont apply a clearcoat because it takes away from the luster of their plating but they will always recommend you clearcoat it to protect it.