-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics
topic 3018



I am building a saguaro cactus like sculpture using 1/8" aluminum fins which are approx. 4" wide X 10 ft long. I need to find a way of painting the mill run aluminum black. What kind of preparation, primer and finish coat(s) should I use so that the paint will stay on in an outdoor environment for at least 25 years?

Any help you could provide would be most appreciated.

Stan Price


I am not exactly understand your phrase mill run black but I believe chromate conversion coating by any kind of application (brush, spray , or dip) will solve your problem. If you need more details please don't hesitate to ask.

yehuda blau
Yehuda Blau
YB Plating Engineering and Quality - Haifa Israel


I really doubt if black chromate would last 25 years, even in Arizona. Probably the best guess is a highly UV resistant powder coat paint. Black chrome plating is another option, but not many "black" shops have huge tanks.

James Watts
- Navarre, Florida


It really depends on what outside wear the aluminum will have. I use a variety of high-end urathane enamel car paints with the UV protectors built in, and I use a number of clear coats on bare metal as well. For blacking, you can also use a product from Birchwood Casey (Aluma Black) for blackening, and a clear over the top. This is all assuming that the sculpture would not have anything other than the normal wear of a car surface. I would be interested in what you decide on. Thanks, Tom

Tom Brumm
Blue Rock Studio - F.H., Washington

(2005) -- appended to this existing thread by editor.

I have a lawnmower type pulling tractor which I am repainting for a friend. It has an aluminum hood and grill. How do I prepare the surface so primer and paint will adhere to it?

Leo Fronczkiewicz
Motorcycle painting - Douglas, GA, USA

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.