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Painting, blasting rims - paint vs powder coat
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Author:  DOZ [ Tue Jul 05, 2016 3:45 pm ]
Post subject:  Painting, blasting rims - paint vs powder coat
I am looking at restoring my std rims, paint or powder coat ?? I want it nice and glossy

cheers Dan
Author:  drmini in aust [ Tue Jul 05, 2016 5:03 pm ]
Post subject:  Re: Painting, blasting rims - paint vs powder coat
I used to be a Plant Engineer in the pallet storage and conveyor industry (Dexion). Racks, frames etc were cleaned, phosphate treated, then powder coated in our $3M facility.
Powder coat works fine for indoors use. When put outdoors in the weather, the colours faded, then adhesion failed at edges and the powder coat peeled off in sheets.
For wheels or subframes etc, I would stick with real paint...! Not paint powder.
Maybe results are better now, but check it out first.
Author:  DOZ [ Tue Jul 05, 2016 6:12 pm ]
Post subject:  Re: Painting, blasting rims - paint vs powder coat
Ok thanks Doc, need a place to blast and paint in a hurry...
Author:  Flute [ Tue Jul 05, 2016 7:38 pm ]
Post subject:  Re: Painting, blasting rims - paint vs powder coat
I had mine done here but I dropped them off so not sure what transport would cost from up north. There should be a similar place up there. They stripped them, repaired them, primed and then painted in correct silver birch metallic. Had no issues after nearly ten years.

http://www.newaywheelrepairs.com.au/profile.html
Author:  Lindsay_Palmer [ Tue Jul 05, 2016 8:02 pm ]
Post subject:  Re: Painting, blasting rims - paint vs powder coat
Powder coating is fine for wheels, but make sure they are using good powder coating. Quality varies a lot. Ask what the warranty is provided by the powder coating manufacturer.

Doc, I think the powder coating you are talking about may have been non warranty grade. It's cheaper and is fine indoors. Bright colours (the racking we have at work is orange) are harder to make durable in the sun, especially in Australia in our UV.
Author:  Timbo [ Thu Jul 07, 2016 12:42 pm ]
Post subject:  Re: Painting, blasting rims - paint vs powder coat
Its a fallacy that powdercoat always fades outdoors. Its just like paint, some does, some doesn't. Just like paint there are heaps of different formulations. Its very widely used on fences and aluminium window frames and they last for years in the sun.

I had the roll bar and bumpers on my Moke done by a guy that specialises in fences and they still look great, 10 or more years later.

On the other hand I had the sunraysia wheels done by someone else and I've never been particulalrly happy with it. They must have used the wrong stuff because it crazed where the spokes flex. Powdercoat is applied electrostatically so it doesn't always throw properly into tight corners, like where the wheel centres meet the rim (and pinholes are hopeless). Once its applied it is heated to melt and fuse the powder particles. The problem is that it can do that again later if the part gets hot. I had a problem with my handbrake locking on which caused the brake on one side to heat up. When I went to take the wheel off it had melted to the hub. The powdercoat on that wheel has never been the same again.

So I'm a big fan of it on things that don't move or get hot, but wouldn't use it on wheels again.
Tim
Author:  Phil 850 [ Thu Jul 07, 2016 10:13 pm ]
Post subject:  Re: Painting, blasting rims - paint vs powder coat
Had my wheels powder coated.
When they are heated, the air between the rim centre and the outer expands and comes out through little bubbles that leave little creators in the powdercoat.
They advised me that I need to get a little brush and paint down in the holes to seal them so that water does not get in a cause rust.

I'd have them painted next time.
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