Er if you mean did I do it properly, then yes
I usually put a coat of gloss (Testor's Glosscoat) then apply the decals using a setting solution so they conform to model's surface better, let them dry for at least 24hrs than apply either a gloss or matt (Testor's Dulcote) coat over the the entire model as required.
You can eliminate the gloss coat part by painting the model in gloss paint to begin with then applying a matt finish if required after completion.
I always apply a finishing coat as I weather my models using pastels and they will rub off or smudge if not protected.