To remove the lettering from pcv. Use Lacquer thinner. once the lettering is removed wash the pvc to make sure no residue is on the pvc. Lacquer thinner will melt pvc so use very little. Wipe lightly with a rag with a bit Lacquer thinner.
Will it come off with rubbing alcohol? That dissolves a lot of inks, and doesn't leave a residue. Try it on clothes when you have an ink stain.
Nice! I need to make a few of these, but with my luck, no one would use them. I have beds all over this house and all of my brats prefer to sleep in trash cans, or in the couch, or in the laundry basket.