Thanks for your suggestion. Anyway, I tried to lay up the only film, but the final result has been really horrible (fortunately I tried to apply it only by hand, no vacuum)!
So, I'm scratching the last layer and I will back to lay up the "normal" procedure peelply-film-breather

ajb100 (30/01/2016)
There's a product called infuply which is perf release file with mesh bonded to it removing the need for peel ply. It woks pretty well, but as above, the finish is worse imo that peel ply