Should I remove the graffiti I have now, or wait and see if I get hit with more?

The fresher graffiti is, the easier it is to remove. Graffiti can get baked onto substrates via the suns ultraviolet rays making it more difficult to break down. To deter graffiti vandals from hitting your wall further, and to ensure the greatest removal success, you are best to remove the graffiti as early as possible (48 hrs).