I know what you meen with the decals , they do look like decals and not a part of the "living"surface of the plane and i agree with you , it doesn´t look that good.
To be hounest i have never tried that kind of postshading before and i´m a bit scared to mess things up with this one , i guess that i might do something about it later after some practise of that tecnice on some old models

Or maybe i leave this one as it is and take this good critic with me in to my folowin projects and do better there. It´s always good to learn new things and grow as a modeller :-)
Cheers
Rogga