so i use xtc 3(epoxy coating) on a hemisphere 3d printed and use armor coat as primer. I tried using krylon covermaster today and dug my nail in it to see if the paint scrapes off but the primer doesnt(...I think since I used three coat of xtc3d and used primer on each layer added so im not sure if my nail is on the primer or epoxy but it looks like the primer). it does and even with krylon clear coat it still scrapes off. it some what worries me. am i using the paint too thick? or should i use a different kind of paint? enamel, acrylic? duplicolor autopaint? not airbrush this time though since i ant to atleast sell a prop that is good enough to enough to get my own airbrush and compressor. but i do want to know what kind of airbrush paint to use too. I heard airbrush paint is alot thinner.