Allow to work 5 to 10 minutes (20°C @ 50 % RH). No need to scrub surface.
Rinse with plenty of fresh clean water, working from top to bottom.
If required repeat process.
TIP: For surfaces heavily encrusted with limescale brush surface with nylon brush 10 minutes after applying first application. DO NOT rinse. Apply 2nd application and leave to work 5 to 10 minutes.
Rinse with plenty of fresh clean water.
ADDITIONAL USES
Liquid sander to passivate raw steel and aluminium before painting.