Yes, more coats will make it purpler up to a certain point- then any further coats start to obscure the reflective undercoat and the candy effect is lost, resulting in a drab and muddy appearance. Don't do that
Also make sure your primer will hold up to the silver backer- I'd apply several light mist coats rather than a wet coat
I put quite a bit of paint on this, there's also a misting of purple pearl over the candy purple
Good luck with it!