<human>: Here is a goal: How do I make the walls of my handmade foam mausoleum look weathered?

Which way makes more sense to accomplish this goal?

OPTIONS:
- Use spray paint and then rub with a cloth to give it a rough look.
- Use spray paint and then sandpaper to give it a rough look.
<bot>: Use spray paint and then sandpaper to give it a rough look.