Pro/Forums - View Single Post

JSimmons · 05-08-2003, 08:31 AM

I'm building some ducting with copper sheet, and was wondering how to keep it from re-tarnishing. As a test, I sanded some scrap copper sheet with 2000-grit wet-or-dry, and then followed that up with polishing with brasso. It looked real good at that point.

After rubbing the hell out of the sheet (to make sure all the brasso was gone), I tried applying a thin coat of clear gloss lacquer (bought a can of spray paint from Home Depot).

The paint orange-peeled, and it severely dulled the previously mirror-like shine. Did I miss a step somewhere?

I was wondering - if the paint is going to do this every time, is there any other way to prevent the tarnish from re-appearing without dulling the finish? Maybe automotive car wax or something?

05-08-2003, 08:31 AM	#1
JSimmons Cooling Savant Join Date: Apr 2003 Location: 4-sided room with an exit going east, and an exit going south Posts: 392	Copper Polishing/Protection I'm building some ducting with copper sheet, and was wondering how to keep it from re-tarnishing. As a test, I sanded some scrap copper sheet with 2000-grit wet-or-dry, and then followed that up with polishing with brasso. It looked real good at that point. After rubbing the hell out of the sheet (to make sure all the brasso was gone), I tried applying a thin coat of clear gloss lacquer (bought a can of spray paint from Home Depot). The paint orange-peeled, and it severely dulled the previously mirror-like shine. Did I miss a step somewhere? I was wondering - if the paint is going to do this every time, is there any other way to prevent the tarnish from re-appearing without dulling the finish? Maybe automotive car wax or something?