So I'm almost ready to shoot my 69 Charger it's original B5 blue. All of the body work is done. The whole car has been primed with a high build 2k primer, guided, and blocked with 220 on a long board. My question is, since the B5 is such a bright heavy metallic, I've been reading on the web to wetsand the primer with 400-600 before shooting the base. This seems a little too fine. I did one side of the car with 500 already and it is very smooth, almost too smooth. I'm worried about adhesion. I want to make sure the paint has something good to bite onto, but I also want to make sure the metallic flows nice and smooth. Does anybody have any experience/advice when it comes to finish sanding primer when using a metallic base?