My DW-5600 which has been my trusty friend for the last 6 months has some white residue from water on the strap (calcium perhaps?)
I removed the lettering on a G-5500 and found rubbing resin with a soft cloth (used for monitor screens) or soft paper towel and nail polish (acetone free) and even merely water has an effect on resin.
I checked it also on my DW-290 strap and there is definitely a visible effect.
Obviously rubbing resin (and plastic to, because the same happened with my plastic Casio) even with a soft cloth and water removes a tiny bit of material.
So rubbing is out of the question, perhaps I could soak it in water and soap, or cleaning alcohol or something else?
It's not a big deal but I would like to get rid of the white stains on my strap.