For a museum exhibition, I need to replicate / match the surface treatment applied to corrugated galvanized steel sheets. The original work was done in the UK using a product called "T Wash" sold by a company named Decorating Direct, intended as a paint pre-treatment to be brush applied after degreasing and detergent washing.The resulting
'look' is a mottled darkened 'patina' with white streaks.
I can't find an ingredients list for this particular product, but a MSDS for a similar proprietary solution lists 2-BUTOXYETHANOL, PHOSPHORIC ACID, and PROPAN-2-OL.
This type of consumer product seems to be common in the EU countries, but due to a short deadline, I would like to find an equivalent locally.
If galvanized=zinc plated you can try 2heaping teaspoons salt/1 teaspoon copper sulphate [adv: item on
Amazon] /1 cup water solution(dark gray to black finish). Hope it helps and good luck.
(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)
Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.
If you are seeking a product or service related to metal finishing, please check these Directories: