Liqui Moly Universal Cleaner NTA free can be applied by spraying, immersion or wiping with a brush, cloth or sponge.
Note: Do not use as a concentrate or leave to dry. Treat coloured- or light metals only briefly and rinse well with water afterwards. The product has a strong degreasing effect and causes colours to fade if used repeatedly in a high concentration. With sensitive materials always test an inconspicuous area first.