Elite armour decals are the best on the market - bar none.

If you can get hold of Humbrol acrylic gloss spray this will help, it dissolves decal film to give a great finish.

Give your model a coat of Humbrol gloss (No 35), apply decals with the usual decal setting solutions, and then lightly apply more Humbrol gloss. Your decals should now look painted on if you did it right...

Now coat with Dullcoat / Tamiya flat clear spray to get rid of the shiny.

Could look like this:



or this