I don’t use zinc chromate anymore either. Self etching primer seems easier to work with, and is better for you. Follow the reccomendations on the can! As Wedgie pointed out, if you wait too long to paint on top of the primer, you have to scuff it, and some spots can be difficult!

I find most of my work is in the prep, get her clean! It will save you time down the road. Have you seen this? Interesting reading.

https://conductorjonz.wordpress.com/201 … p-day-one/