Graffiti removal requires specific tools, materials, safety gear, and often surface-specific methods to effectively eliminate unwanted paint, markers, or etchings without causing excessive damage to the underlying surface (e.g., concrete, brick, metal, glass, or painted walls). The exact requirements vary by the type of graffiti (fresh vs. aged), surface porosity (porous like brick/concrete vs. non-porous like metal/glass), and scale (small tag vs. large mural). DIY is feasible for small, fresh jobs, but professionals are recommended for large, porous, or historic surfaces to avoid permanent damage like etching or discoloration.