An essential product, to rust in a natural way, tracks made out of white metal. You just need to submerge the tracks in the liquid for a few minutes and the metal takes on a realistic dark and oxidized aspect, easily and effortlessly. Tips and hints regarding the burnishing agentClean before immersionwhy:Avoid uncovered spots causing irregular colouring Use a plastic traywhy:Avoid unintended reactions with other tray materials thin 1:1 with waterwhy:Better control if you aim for natural results.More time to eleminate bubbles (irregular colouring)Better coverage when immersed completely ((irregular colouring)) Separate the emerging sediment before store for re-usewhy:Avoid prolonged and unintended chemical reactions causing the”exhausting” of the product over the time once stored.