I've had that happen when I applied the first coats too thick, instead of several thinner layers. The thicker coat didn't completely dry and harden all the way through, and the netting cut into it.
I make sure to spray light coats, and heat set each one thoroughly, before adding another coat.
Color with lots of pigment, like opaques and pearls, are the worst culprits for this, so be sure to do thin coats with them, and heat dry each one.
I also don't clamp my netting onto my lures to paint them.
I have an "easel" type setup, with a piece of 1/4" foam board mounted on the face of a sheet of plywood that's leaned next to my paint area.
I attach a piece of tulle netting at the top of the plywood, so it drapes down over the foam.
When I want to scale a lure, I hold the lure when I want it, and use push pins to pull the tulle around it semi-tight. The push pins and tule keep the lure in place, so I just spray my scale color, hit the lure with the hair dryer, and remove the push pins while holding the lure by the tail or bill.
It works for me.
I also wear a blue nitrile glove on my left, non-air brush hand, so lots of times I hold both the tulle and the lure by the bill in my left and shoot the scale color like that. That way my hand stays clean, and I can hold stuff much better than trying to clamp or pin it sometimes.
The blue gloves last a long time.
I am no artist by any stretch of the imagination. I am a carpenter who makes baits and paints them.
I only paint for myself now, so I'm a little more cavalier about my painting than I was when I sold baits. I want the general effect, but I want to get them finished and top coated, so I can fish them.