Lesson one, take all the masking off before you aply powder coat.

Lesson two, lay down a coat of white before applying candy

Lesson three, anything you want to show up needs to be at least a millimeter wide.

I used a 90w laser at my local maker space to remove very precise areas of powder coat from this 125B/1590NL. Then I filled the areas cut away with red candy powder coat. Finally I baked the new powder coat in a used toaster oven purchased for the purpose. Lessons above are learned for the next one I try, which will likely be gold or copper into red or black.