Painting question Options

[Sea Dragon 914]

I'm refinishing some of my wheels and have questions about paint. I'm not sure if this is where to ask.

I am using a two stage paint to refinish some wheels. I've stripped the wheels to bare metal and used a bare metal primer. I let that sit for a few days and then sprayed three base coats. I let them cure overnight and then sprayed a coat of clear.

There were a couple areas that the paint wrinkled pretty badly. Most of it looked good. I wet sanded to see what happened as I figured I'd reshoot the wheel anyway and it looks like where it wrinkled, the primer actually pulled away from the metal.

Why did it wrinkle? Did I not let the primer and/or base dry enough? Should I have sprayed the base directly on the metal?

This is practice as I'm hoping to shoot one of my cars.

Thanks