I feel your pain. I've tried a dozen different yellows over the years and could never find one I liked from Krylon or Rusto. I ended up using Tamiya brand for a while but that gets expensive quick as it typically takes two cans to do something like a Bertha.
When I rebuilt my Bertha last time I took a chance and tried Ace brand Safety Yellow. This was shot over flat white SEM primer. Two coats and it looked awesome. I've been moving to Ace brand paints for as much as I can. I really like their stuff but the colors are limited. I've used their Black, White, Safety Red, Yellow and Orange and the paint goes on great and dries hard but it does take a full day before you can handle it and several more before it's cured. I'm OK with the wait as I've dropped rockets and and haven't hurt the paint.
Here is the Bertha with Safety Yellow. https://www.acehardware.com/departments/paint-and-supplies/spray-paint/general-purpose/1010107
View attachment 574882