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Reverse graffiti [note 1] is a method of creating temporary or semi-permanent images on walls or other surfaces by removing dirt from a surface. It can also be done by simply removing dirt with the fingertip from windows or other dirty surfaces, such as writing "wash me" on a dirty vehicle.
An anti-graffiti coating is a coating that prevents graffiti paint from bonding to surfaces. Cleaning graffiti off buildings costs billions of dollars annually. [ citation needed ] Many cities have started anti-graffiti programs but vandalism is still a problem.
A new and emerging approach to graffiti removal management is Predictive Removal Management. This involves the use of a database of information regarding graffiti incidents within a city. This is often developed by the government or the graffiti removal service provider. This database is then data mined to determine patterns in graffiti ...
Starch and polyester blends have also been found to be completely biodegradable. [5] The presence of a continuous starch phase allows direct consumption of the plastic by microorganisms because the material becomes more hydrophilic. Microorganisms can directly attack and remove the starch from the plastic, leading to its degradation.
Gamma-Butyrolactone is used as a chemical solvent and a cleaning agent, [15] for example in paint stripping or for cleaning graffiti. [16] Butyrolactone is a precursor to other chemicals. Reaction with methylamine gives NMP, and with ammonia gives pyrrolidone. It is also used as a solvent in lotions and some polymers. [5]
[10] [11] As of 2022, the local company Portland Graffiti Removal removed graffiti for ODOT. [12] [13] ODOT's $2 million in funding ran out in 2023. [14] [15] The city requires building owners to remove graffiti within 10 days or risk a fine. [16] In practice, the code is not being enforced against property owners. [17]