After much trial and error I have concluded that foil hot stamping is not for me. It seems the jig needs to be smooth to get decent results. My mold was designed with horizontal lines. After hand sanding several jigs I was able to get some decent results.
Refusing to be defeated, I tried nail foil. Much like the gold/silver foil it only requires a light coat of gilding glue. Just lay down a black base first. This proved much easier to apply and shows through a light top coat of paint.
In the picture on the left is the nail foil (two airbrushed with blue alcohol ink, one airbrushed with green alcohol ink, and two unpainted). Middle shows foil hot stamped with airbrushed backs. Finally, far right are ones that are just airbrushed. All finished with three dip-n-drip coats of CS Seal-Coat. I’m still trying to master using stencils with my cantankerous airbrush. Let’s just say it has been called everything but an airbrush.
If you’ve been thinking about trying the stencils that Do It offers I recommend them. Good quality and easy to clean with a bit of rubbing alcohol.