Removing graffiti

Whether graffiti is on a small or large scale, using the correct products and techniques in its removal and prevention is vital. Bradley Reames outlines the techniques and products that can be used for solutions 
to indoor and outdoor graffiti problems.

10 March 2011

   
The main objective with removal is to preserve the condition of the area as much as possible and to prevent future vandalism. To ascertain the appropriate removal technique you need to identify, if possible, the type of product or instrument that was used to do the graffiti. You will also need to consider the actual structure of the area affected and the material of the surface. Some of the most common techniques for graffiti removal are listed below:

1⁄Painting
Painting over graffiti is often considered to be the easiest solution for removal, however there are some factors that you need to consider. It is recommended that you use a primer first as in many cases the graffiti will show through. One of the main obstacles when painting over graffiti is correctly matching the original paint colour. In surface areas where the colour can’t be matched, it may be better for the whole area to be repainted. This may be convenient for spot fixing in the event of a recurrence but may end up being costly depending on the size of the area affected. Once the affected surface has been repainted it is advisable to also cover the area with anti-graffiti coating.

2⁄ Sanding
Sanding can be used to remove graffiti but it is not appropriate for many surfaces as this form of abrasive treatment can cause the material to wear down and damage the surface if the pressure is too hard. This method works best on outdoor fencing, although it may leave the area vulnerable should the vandalism happen again.

3⁄ Scraping
Scraping is a method mostly used for internal areas on indoor surfaces such as tables, desks and toilet cubicles. This technique however is dependent on the materials that have been used to cause the graffiti. The scraping method can be effective on nail varnish and corrective fluid but spray paint and permanent markers will require a chemical-based remover. Scraping may also cause damage to surfaces, especially if toilet cubicles are factory painted, as the paint is more likely to come off.

4⁄ Disinfectants
Ordinary disinfectants and citrus-based cleaners can be used for situations where pencil, non-permanent pen markers and ink have been used. It is important not to rub (ink especially) as this can spread and make the affected area worse. It is recommended that you neutralise with water and dab at the graffiti to remove.

5⁄ Chemicals
These are used for harder-to-remove materials such as spray paint and marker pens. It is vital for environmental and personal warnings to be displayed and ventilation to be considered when using chemical-based products. The chemicals can be harmful and the safety data sheet must always be referred to. The safety data sheet highlights the hazards that the chemical presents as well as emergency measures in case of accidents. It will also include instructions on how to correctly handle and store the product in 
a safe manner.

6⁄ Power wash
Power washing and abrasive blasting is one of the most effective techniques and is generally used for outdoor surfaces such as brick walls, fences, and concrete. It is highly recommended, however, that this method is only used by trained professionals, and not with DIY home kits, as too much pressure can wear down the surface. In many cases, the runoff from the graffiti is considered an environmental hazard as it can flow into water streams and drains.

7⁄ Removal gel
This is recommended for more fragile areas such as glass, however, depending on the instrument or material used to cause the vandalism, other forms of removal may be required such as gentle scraping. The chemicals can be harmful and the safety data sheet must always be referred to. The safety data sheet highlights the hazards that the chemical presents as well as emergency measures in case of accidents. It will also include instructions on how to correctly handle and store the product in a safe manner.

8⁄ Prevention
Prevention is often the best cure. The most common method for prevention is by using specially designed anti-graffiti paint and products on surfaces. These protect and minimise the damage caused and can be used on most surfaces, however it is always important to check the guidelines as some surfaces are not recommended. Anti-graffiti coatings will allow for an easier removal of graffiti and in most cases it can be washed away with warm water and mild detergents.

If graffiti is a recurring problem at your premises you should consider installing security lighting and CCTV cameras. You should also report the problem to the local community police as this identifies areas that are graffiti hot spots and will make them aware of the situation.

Bradley Reames is managing director of Peartree Cleaning Services