Rusting Metal Roofing
I decided that I needed the corrugated metal roof to be rusted and corroded to match the peeling paint of the Fryxell Feed Store. I used Ferric Chloride to “rust” out the individual panels once I had cut them to the needed size.
Make sure to fully read the directions on the bottle when using chemical etchants. Use safety equipment as directed and make sure to use in a well ventilated area, preferably outside. Make sure to follow local regulations on disposal of used etchant.
I dipped the pieces into the solution and left them there until they “boiled” violently. I then swished the pieces in water to stop the reaction and set them to dry after wiping the gunk off of them. Once dry I attached the pieces to the cardstock sub-roof using a CA type glue, although in the future I think I will use tacky glue.
Once I attached the roof panels I used a mixture of several different colors of pastel chalks to provide the rusted color I wanted. I then sealed the roof using Dulcote.