Author Topic: Clear coat for aluminum  (Read 724 times)

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Offline koenbro

  • Posts: 76
Clear coat for aluminum
« on: July 03, 2020, 10:38 AM »
I am downsizing my shop from 2 car slots to one, and in the process, had to get rid of my dedicated router table. So I took a 5/8" 6061 aluminum plate and cut out on the CNC a shape to accommodate my Jessem router lift that will fit into a Bosch contractor Table Saw. I had to use Aluminum for the table because that's the most I can cut on my CNC, but it came out great, it's solid, level with the lift,  and will likely stay flat. I welded up a dust box from 1/16" alum and used an old hose connector to make an adapter for my 4" dust extractor; I used a Rockler dust box in the past and with a 4" suction it was virtually dust free. When the router is not used, it will sit on shelf in a storage room.

My questions is: how can I finish the aluminum so that black discoloration from it does not transfer to the wood? Is there some water based epoxy or any other clear finish I can spray?

MFT/3 • TS 55 REQ • Carvex PS420 EBQ + Accessories • OF1400 + LR32 + MFS400 • Domino DF500 • AvidProCNC 24x48" • ETS EC150/5 EQplus • DTS 400 REQplus • CXS • CT 26E • Fuji Q4 + 3M PPS

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Offline koenbro

  • Posts: 76
Re: Clear coat for aluminum
« Reply #1 on: July 03, 2020, 10:50 AM »
MFT/3 • TS 55 REQ • Carvex PS420 EBQ + Accessories • OF1400 + LR32 + MFS400 • Domino DF500 • AvidProCNC 24x48" • ETS EC150/5 EQplus • DTS 400 REQplus • CXS • CT 26E • Fuji Q4 + 3M PPS

Offline deepcreek

  • Posts: 914
    • TimberFire Studio
Re: Clear coat for aluminum
« Reply #2 on: July 03, 2020, 11:33 AM »
Very nice job!

I have sprayed aluminum with Deft rattle can lacquer to keep it from oxidizing but that is a build finish and might wear off with use.

Perhaps Boeshield T-9 would do the trick.
Joe Adams
TimberFire Studio
Houston, Texas

http://www.facebook.com/timberfire

Offline Cheese

  • Posts: 7511
Re: Clear coat for aluminum
« Reply #3 on: July 03, 2020, 11:41 AM »
The problem with aluminum is getting the paint to adhere to it because after cleaning/abrading the surface, it immediately builds an oxide layer. In the past a chromate primer was mandatory, however there are now self-etching primers available.

I stumbled upon this paint a couple of years ago made specifically for aluminum boats, I haven't tried it though. If you decide to use it, check back and let us know how well it works. [smile]

https://www.jamestowndistributors.com/userportal/product.do?part=512771&engine=adwords&gclid=EAIaIQobChMI-LOtzLKx6gIVDdbACh3a9w7jEAQYAiABEgLOHvD_BwE

Nice job by the way on both the table and the dust collector box.  [big grin]

Offline AstroKeith

  • Posts: 93
Re: Clear coat for aluminum
« Reply #4 on: July 03, 2020, 11:50 AM »
I'd find a local anodising shop. Last time I had a piece that size it cost me £5 to get anodised and died black.
Retired engineer/scientist

Offline DeformedTree

  • Posts: 839
Re: Clear coat for aluminum
« Reply #5 on: July 03, 2020, 12:38 PM »
Rustoleum makes a Primer for Aluminum

I've used it and stuff is holding up just fine.

You can also go down the real proper path and alodine it,  you can get jugs of the stuff and apply it. I've never done this, and not sure how hard it is to do at home/not professional.    Looks like Henkel has stuff you can buy.

Offline rvieceli

  • Posts: 1223
Re: Clear coat for aluminum
« Reply #6 on: July 03, 2020, 01:02 PM »
there appear to be a few anodizers in Phoenix. I'd try one those operations and see if they will do it. Obviously you'll be a small fish in a big pond, but many times if you are nice, don't have a rush deadline etc etc. they will accommodate you.

Ron


Offline koenbro

  • Posts: 76
Re: Clear coat for aluminum
« Reply #7 on: July 03, 2020, 03:24 PM »
Wow, thanks for all the answers! I didn’t even think to anodize it but it sounds great and I am going to call a few shops come Monday. Will show the result


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MFT/3 • TS 55 REQ • Carvex PS420 EBQ + Accessories • OF1400 + LR32 + MFS400 • Domino DF500 • AvidProCNC 24x48" • ETS EC150/5 EQplus • DTS 400 REQplus • CXS • CT 26E • Fuji Q4 + 3M PPS

Offline Precision Dogs

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  • Posts: 30
    • Precision Dogs - Gadgets for woodworkers
Re: Clear coat for aluminum
« Reply #8 on: July 03, 2020, 04:06 PM »
Since its a surface that you will rub material against a lot, do a hard anodizing, Type III. Color does not matter obviously. Usually Hard clear is the cheapest because no dye involved. Just take into consideration that it adds about 2 mil, or 0.002" to surface thickness( or 0.004" on a diameter). If you have some very tight fittings, you might need to ask them to mask it ( shops will do it if asked). Normally, if it is a through hole - no biggie with clearance, but with threads you might encounter an issue of them becoming too tight.

Good luck!
Jerry
IG- @precisiondogs
Facebook - https://www.facebook.com/precisiondogs

Offline koenbro

  • Posts: 76
Re: Clear coat for aluminum
« Reply #9 on: July 03, 2020, 07:23 PM »
Very helpful, thanks. I tapped some holes to attach the dust box, will ask that they be masked.
MFT/3 • TS 55 REQ • Carvex PS420 EBQ + Accessories • OF1400 + LR32 + MFS400 • Domino DF500 • AvidProCNC 24x48" • ETS EC150/5 EQplus • DTS 400 REQplus • CXS • CT 26E • Fuji Q4 + 3M PPS

Offline ben_r_

  • Posts: 1309
Re: Clear coat for aluminum
« Reply #10 on: July 03, 2020, 11:53 PM »
I'd find a local anodising shop. Last time I had a piece that size it cost me £5 to get anodised and died black.
This! Get that thing anodized! You did a good job there man! Anodizing would be the proper finishing touch!
If at first you don't succeed, redefine success!