The solution is to apply gloss varnish, or even paint the model with gloss paints, before applying the decals.
For some, detailed art work is near impossible to hand paint, the only way would be using decals.
The version in the final mod will have Argentine decals.
It took us about 10 minutes to set it up and put the decals on.
Very much like the bits box for your miniatures, unused decals will always come in handy.