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topic 6225

Painting galvanized ductwork


(2000)

Q. We are remodeling our basement. We would like to paint the galvanized duct work and need assistance as to the right procedures to follow. We are attempting to end up with a high gloss finish. Your response in a timely fashion would be appreciated.

Rita D. Wolter
- Dearborn, Mi. Wayne county


(2000)

A. Simply put, finishing of the ductwork in your basement is similar to that of an automobile. First, the metal needs to be thoroughly cleaned. Usually, hot water and soap for starters (I prefer Dawn because it breaks down grease well).

After this is done and all grease, dust, debris, rust and any foreign element is completely removed, wash the metal down again with paint thinner. This will remove any soap residues.

Next, prime the metal with a good primer [Galvanized Metal Primer [linked by editor to product info at Amazon]]. Almost any good paint store can recommend a good primer for metal. Be sure to tell them that the metal is galvanized sheet metal.

Be sure to cover all surrounding items with drop cloths to assure that no unwanted paint ends up where it doesn't belong.

Finally, paint with the color desired. Also, spray painting will provide the best results. Additionally, make sure NOT to touch the primer coat with your bare hands. The grease from your hands will cause bubbles to occur. I suggest wearing rubber gloves if any handling is required.

Good luck and I hope it all turns out well.

Lamar Jenkins
sheet metal company - Jonesboro, Georgia



Painting galvanized steel for Kinetic (mobile) Art

December 9, 2015

Q. I am interested in producing kinetic (mobile) art that will be suitable for urban/rural residential outside placement. I will be cutting the forms and spray painting/masking etc. as well as welding these shapes on rods.
Can you suggest how to make the most clean cuts and what type of paint (after priming) would be best for adherence and durability? I am guessing that you would recommend enamel or automotive paint.
Any special instructions on what sort of weld to use?
This is a serious inquiry and I do appreciate any way that you may guide me on this! :) Thank you-Ceal

Cecilia Montague
- Holbrook, New York, USA


December 10, 2015

A. I am sorry; you do not make it clear what material you are working in.

I would guess iron. Welds often do not take coatings the way forged metal does. As for preconditioning prior to painting you might consider a phosphate wash primer or a phosphate coating. This gives the surface some "tooth" that helps it grab the paint.

For outdoor exposure I'd suggest that steel alloy called "Cor-Ten" It rusts up to a certain point leaving a decorative rust color.

If you are looking for a color other than rust red or black on iron there are other options besides painting. You can coat the whatever with copper, via brush plating or immersion copper plating, and use various solutions to apply green or blue patinas to get the effect you want. Paint is fake and it looks fake. It will not stand up to the years.

We can help you some more and I for one am glad to. Just give us a bit more info, OK?

dave wichern
Dave Wichern
Consultant - The Bronx, New York



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