Mask it off yourself...
I was a design major in college, we used something called liquid frisk, you paint it onto details so when you paint, after it's dry, you use a gummy eraser to remove the frisk; it's used to mask details too small for frisk film (a masking sheet we use in commercial design work)
It's basically thinned out rubber cement. you can use reducer (paint thinner) to thin out rubber cement a little; making your own liquid frisk. it's sold mostly in art supply stores like hobby lobby, Michaels, dick blick, etc..
using a small paintbrush, you can paint rubber cement or liquid frisk over the details before painting, once your frisk has dried, paint the basecoat on your piece. Once the paint has completeley dried, the details can be exposed and the piece clear-coated. Using a gummy eraser, or a rubber cement eraser (also available at an art supply store) as well as a tackcloth, you can remove all the frisking before clear-coating.