I wonder how they will react when painted over another color scrape-able paint, as on a 3-color camo job.

wonderful once I can afford it I will give it a try

What do you do? Paint it over a rust or primer color base coat, then scrape? What kind of paint is it, and do you put it over an acrylic base, or enamel, or lacquer? Or it doesn't matter? And what kind of tool do you use to scrape - wet brush, toothpick, chisel, etc? So many questions!