If it's so low that the commericals aren't interesting in using that level, then you should have no problem getting a clearance.
Unfortunately, this doesn't work in Italy
The way to fly VFR there, as in many other places, is to fly at a high level, say FL080, on a VOR-VOR-VOR route. Firmly request "G-xxxx request [give the relevant section of your route] at FL080".
Those who ask, firmly but politely, get the routes they want!
And stay on the ball, because the handovers may not work, so if it looks like they are going to forget you (and leave you at FL080 in Class D with nobody to talk to) make the call asking for the handover, or just ask for the next bit of the route which will be just as plain.
Always read back everything carefully, with "cleared to transit XX-XX-XX", for the tape. ATC abroad is laid back and they often don't clear you explicitly.
ATC everywhere prefer pilots who fly like this because it tells them you know what you are doing. Navaid and airways intersection names are the way to do it. The moment they get somebody rolling off obscure VRP names they will be more concerned.
One still needs a backup plan, outside CAS. I always had to invoke this when I used to go down there VFR, because they tend to suddenly forget about you. A decent GPS is a must, obviously.
If there is low cloud then you will probably have to fly either the published VFR routes, or just sit offshore over the sea, away from the Class D airport circles.