<human>: Objective: How do I scratch the acrylic glass to make it frosted ?

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- Rub a paper towel on one side of the acrylic glass to render it frosted.
- Rub  120 grit sandpaper on one side of the acrylic glass to render it frosted.
<bot>: Rub  120 grit sandpaper on one side of the acrylic glass to render it frosted.