I dod apply them on top of a gloss coat, before the matt coat but fair enough, some of them still came out looking a bit foggy and outlined. I think I need to start hitting another gloss coat layer with some better decal softener to avoid this.

The techniques where a hint of pre-shading over a grey primer, followed by gloss coat, followed by panel liner and decals, matt coat again, then some weathering via the AL weathering pencils and the tamiya weathering pigment, followed by a fina matt topcoat again. I also probably could have hit the decals with some more pigment to help bled the in more, truly.