Hi, we used foil on our cabinet doors and drawers in our G.A apartment, like the one you use on cars, but for furniture.
After the first two doors/drawers it was very easy. And the result was very good.
You “have” to be two person, one to hold the foil, and one to put it on the doors.
We bought ours in a store in Norway, but I am sure you can get it in Spain as well, or maybe eBay…
(Edited links 09/01-2022)