Preperation and Usage: | Don't use on hot, damaged, or acid sensitive surfaces (e.g. gold, silver, copper, aluminium), coloured or old/damaged enamel, household appliances (incl. water boilers), natural stone (e.g. marble, travertine). If in doubt, test first on a hidden area. Tougher encrustations: leave to act max. 3 min. before rinsing. |