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Painting aluminum with rattle can paint

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Painting aluminum with rattle can paint

Old 11-08-2019, 06:27 PM
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Default Painting aluminum with rattle can paint

My two scoots for our minimal riding here in Florida have shabby looking front forks. I'm thinking I will just sand, two coats of Rustoleum aluminum primer, two coat of silver or aluminum color paint.
I'm certain some of you have done this to a T-top or tower on the boat.
Results?
Tips appreciated.

This is the 06 Harley I just bought today, my Honda Valkyrie s about the same.


Old 11-08-2019, 06:33 PM
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If its possible to separate the bottom scuffed up tubes, I would consider having them chromed.
In my opinion the aluminum color paint never looks great.
Its a beautiful bike and you cant have too much chrome on a black Harley.
Old 11-08-2019, 06:39 PM
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Sand em and paint em. I’ve done lots of stuff with rattle cans with good success. I was in the paint and body business over 40 years. Just cover everything up good so you don’t get overspray on everything
Old 11-08-2019, 07:32 PM
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Rattle can works fine, spend your time on samding prep. One coat of primer is fine. 3-4 very light coats of paint will give best results, an hour or so in between coats. The Rust-Oleum paints are great but they take a lot longer to cure hard than you'd think. It lays down great but takes 5-7 days to reach full hardness.
Old 11-08-2019, 07:45 PM
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.I recommend using a self etching primer after you sand prep on aluminum as it tends to have adhesion issues. I use SEM brand but there are others.
Old 11-08-2019, 08:16 PM
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Use a primer. Duple-Color chrome wheel paint will look decent.
Old 11-09-2019, 12:53 AM
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That discoloration is the factory clear annodize. You can use spray oven cleaner to remove it, or dissasemblle the fork and place them in a lye bath. The right way would be to send them out for re-annodize, powdercoat or chrome.
Old 11-09-2019, 02:26 AM
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I've used this in similar applications. It leaves a great aluminum finish. Been used at machine shops for years. It comes in cast steel and aluminum.You can find it at most auto parts stores.

https://www.plastikote.com/products/...st-Finish.html
Old 11-09-2019, 04:31 AM
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That is just the clear coat damaged what will look best is to strip all the clear coat buff it up and relearn coat it. Paint will look horrible
Old 11-09-2019, 05:01 AM
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Originally Posted by crabbinmike View Post
That is just the clear coat damaged what will look best is to strip all the clear coat buff it up and relearn coat it. Paint will look horrible
What he said^^^
Cover all of the chrome, the uppers, and painted surfaces. Use aircraft stripper to remove the old pitting clearcoat. Polish them up, using a Dremel to get to the tight spots, and reapply clearcoat.

The other way is to remove the lowers, and swap them out for powdercoated or chromed. There are a number of guys on Ebay that do swaps.
Old 11-09-2019, 05:05 AM
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I would strip the coating that’s on there and consider something like cerakote clear for aluminum or have the tubes anodized.

To answer your specific question, a satisfactory painted finish can be achieved by stripping, cleaning, priming and painting. I have restored old outboards and have made repairs to powder coated aluminum brackets this way.
Old 11-09-2019, 06:02 AM
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I like eastwood paints for rattle can use. Seems to last longer and be more durable then rustolleum, you can order online and maybe able to get at the local auto parts store
Old 11-09-2019, 06:31 AM
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Originally Posted by crabbinmike View Post
that is just the clear coat damaged what will look best is to strip all the clear coat buff it up and relearn coat it. Paint will look horrible
^^^^^^^^^this^^^^^^^^^^^

Old 11-09-2019, 08:09 AM
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Take them apart and have them rechromed. Nothing to it. Easy peezy

https://www.carlsalter.com/harley-service-manuals.asp

Amazon Amazon

Last edited by Thalasso; 11-09-2019 at 08:28 AM.
Old 11-09-2019, 09:03 AM
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Looks like they were an anodized part, which is a plating for aluminum. The plating's coming off. Prime and paint is the easy way to get out as inexpensively as possible.
Old 11-09-2019, 09:57 AM
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Just get the lowers chromed or replace them with chrome parts. The lower forks take the most beating and repainting them only fixes the problem for a little while. How many miles are on that bike?

http://khromeking.com/harley-chromep...-exchange.html


Last edited by JKBrad; 11-09-2019 at 10:04 AM.
Old 11-10-2019, 04:51 PM
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Pics and opinion of Valkyrie while this thread is still ongoing please. A HS buddy from the 70's want me to buy his 2015 model. He bought it new
and want's it gone after a divorce. Beautiful machine.
Old 11-10-2019, 05:14 PM
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Paint it, removal, stripping and chroming it is way overkill, for what? No one is looking at it besides you any way....
Old 11-10-2019, 05:27 PM
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It's hard to get paint to stick to aluminum. Aluminum has low surface energy. That means that all of the chemical bonds on the surface are already in use so it's very difficult to get the paint to bond chemically. But, it can be done:

1. sand to scuff the surface and remove the aluminum oxide that forms when aluminum is exposed to the air.
2. paint with the proper primer for aluminum. The best is zinc chromate - if you can find it. An etching primer is the second choice.
3. Once you have a layer of primer, you can paint with whatever you want and it will stick just fine.
Old 11-10-2019, 05:41 PM
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Originally Posted by maintenanceguy View Post
It's hard to get paint to stick to aluminum. Aluminum has low surface energy. That means that all of the chemical bonds on the surface are already in use so it's very difficult to get the paint to bond chemically. But, it can be done:

1. sand to scuff the surface and remove the aluminum oxide that forms when aluminum is exposed to the air.
2. paint with the proper primer for aluminum. The best is zinc chromate - if you can find it. An etching primer is the second choice.
3. Once you have a layer of primer, you can paint with whatever you want and it will stick just fine.

https://www.amazon.com/Rust-Oleum-960402-Performance-Chromate-restrictions/dp/B0086A3YIQ/ref=sr_1_8?gclid=CjwKCAiAh5_uBRA5EiwASW3IakXGvU8iP6deDcNuvTT3N1pCjDLuzHctyLb08S3ULiUODbLxql4IohoCIqMQAvD_BwE&hvadid=177621524596&hvdev=c&hvlocphy=9051888&hvnetw=g&hvpos=1o1&hvqmt=b&hvrand=5530391806476727806&hvtargid=kwd-21215274188&hydadcr=7528_9880925&keywords=zinc+chromate+primer+for+aluminum&qid=1573436476&sr=8-8 https://www.amazon.com/Rust-Oleum-960402-Performance-Chromate-restrictions/dp/B0086A3YIQ/ref=sr_1_8?gclid=CjwKCAiAh5_uBRA5EiwASW3IakXGvU8iP6deDcNuvTT3N1pCjDLuzHctyLb08S3ULiUODbLxql4IohoCIqMQAvD_BwE&hvadid=177621524596&hvdev=c&hvlocphy=9051888&hvnetw=g&hvpos=1o1&hvqmt=b&hvrand=5530391806476727806&hvtargid=kwd-21215274188&hydadcr=7528_9880925&keywords=zinc+chromate+primer+for+aluminum&qid=1573436476&sr=8-8

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