In South Wales, Australia the local council will distribute free graffiti removal packs to businesses. This is part of the next phase in their graffiti and vandalism prevention program. Research is showing that a good deterrent to graffiti is to remove it within 48 hours. This keeps some vandals from coming back. If this new program works then they plan to give out free packs to more property owners.
Source: Free Graffiti Removal Packs