Great info Retropin...

Is there any one that sells stencils for circles and triangles around inserts as it is impossible to cut a perfect circle by hand

so it can be air brushed instead of using decals

Thats the things that gave me grief. They lift on the edges ever so slightly and you can actually feel them sticking through the clear.
As Retropin said they can be sanded down and I got away with it but I still feel clearing over a decal is a no-no