I have door frames which are made of veneered pressed cardboard and are unfortunately already a bit shabby. Can such veneer be thoroughly sanded with, say, 180 grit sandpaper and an orbital sander? There are a total of six frames, so I can't sand them all by hand.
You can do it. With caution, 300-600.
Buy yourself 300 discs of Abranet. K.
Calculate with a half-millimeter veneer thickness in mind. Caution.