J3 final colors (white/yellow)

[GrangerCub1]

Folks,
I am recovering my '46 J3. I've read numerous recommendations on spraying white over the silver before the final yellow goes down. Thoughts on number of coats for white and number of coats for yellow? Also, gallons of poly-spray for each color.
Thanks,
Sean

 

[bob turner]

 

[cubrath]

 

[bob turner]

 

[GrangerCub1]