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Refinishing BBS RC090 Wheels - Pictorial and Video

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Slownrusty
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Refinishing BBS RC090 Wheels - Pictorial and Video

Post by Slownrusty » Sat Oct 23, 2021 11:54 am

I refinished a set of RC090s not too long ago and pleased with the end result

It is a lot of work (easily 8/hrs per wheel) and very dusty/ dirty too, but worth it.

These wheels are held together with splined bolts so splitting them apart is fair bit of work with the years of brake dust and grime that cause the bolt to bind. I bought brand new splined polished bolts from the UK and did not re-use the OEM bolts.

I powder coated the centers on my wheels in a metallic silver.

For the lips, I stripped the factory clear coat and then used three types of clay polishing compound (coarse, medium and fine) to get the mirror finish.

Please use a mask and protective clothing if you attempt this.

these are the wheels before, when I first bought them, you can see they have curb damage as well:
s-l1600.jpg
s-l1600.jpg (978.65 KiB) Viewed 365 times
s-l1600 6.jpg
s-l1600 6.jpg (359.7 KiB) Viewed 365 times
s-l1600 5.jpg
s-l1600 5.jpg (227.38 KiB) Viewed 365 times
s-l1600 3.jpg
s-l1600 3.jpg (312.66 KiB) Viewed 365 times
Last edited by Slownrusty on Sat Oct 23, 2021 12:51 pm, edited 1 time in total.

Slownrusty
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by Slownrusty » Sat Oct 23, 2021 12:02 pm

In the pictures below, I have split them apart:
BBS RC090 Before 3.JPG
BBS RC090 Before 3.JPG (889.81 KiB) Viewed 363 times
BBS RC090 Before 1.JPG
BBS RC090 Before 1.JPG (1.07 MiB) Viewed 363 times
Faces ready t be powder coated along with some other engine parts:
RC090 Faces.JPG
RC090 Faces.JPG (1.01 MiB) Viewed 363 times
Paint Stripper, bubbling up the old clear coat:
Paint Stripper on Lip 2.JPG
Paint Stripper on Lip 2.JPG (986.96 KiB) Viewed 363 times

Slownrusty
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by Slownrusty » Sat Oct 23, 2021 12:06 pm

To remove the curb damage I use a 90-degree die grinder on my air compressor and fibrous wheels of varying roughness (from coarse to fine) depending how severe the damage is. This takes some experience as you will need to work the aluminum back and forth and shape it to retain the original curvature and of course not remove too much material in the process. If the curb damage is severe, it will require filling the damage with a TIG weld and then shaping it, which will add at least 1-2 more hours.

After two passes of polishing, here is a side by side:
Polished vs Not.JPG
Polished vs Not.JPG (977.25 KiB) Viewed 363 times
Then completely polished with new hardware (torqued to 22ft.lbs)
BBS RC090 After.JPG
BBS RC090 After.JPG (982.26 KiB) Viewed 363 times
And a side by side comparison:
Before and After.jpg
Before and After.jpg (526.37 KiB) Viewed 363 times
I hope this video helps as well:
https://www.youtube.com/watch?v=nJUg12Mk-JE&t=1s

And mounted on the car:
BBS Mounted 4.JPG
BBS Mounted 4.JPG (1.16 MiB) Viewed 363 times

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hornhospital
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by hornhospital » Sat Oct 23, 2021 8:29 pm

WOW! =D>
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann";'87 325is "Odette"; '93 325is "Elvira"; '95 M3 "Ashlyn"; '95 318is "Bebe"

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MrE
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by MrE » Sun Oct 24, 2021 12:22 am

Very impressive work mate, well done. =D>
Image

Slownrusty
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by Slownrusty » Sun Oct 24, 2021 1:26 pm

Thank-you!

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anchored
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by anchored » Mon Oct 25, 2021 4:32 pm

Question.

Is the stripper you used the old style with methylene chloride.

The new stuff is absolutely useless
SHRKATK - Red 87' 635csi

Slownrusty
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by Slownrusty » Mon Oct 25, 2021 6:25 pm

anchored wrote:
Mon Oct 25, 2021 4:32 pm
Question.

Is the stripper you used the old style with methylene chloride.

The new stuff is absolutely useless
That is 100% correct, I had an old can laying around and it works like magic....the new stuff is crap.

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anchored
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by anchored » Tue Oct 26, 2021 5:42 pm

Yeah. I need to figure out where I can get the deadly stuff.

I tried and failed and now my wheel is orange using the new stuff.

I think I am just going to keep hitting up yard sales until I find some.
SHRKATK - Red 87' 635csi

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hornhospital
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Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by hornhospital » Tue Oct 26, 2021 9:23 pm

I've been restoring and rebuilding locomotive air horns for 20+ years (thus the hornhospital screen name). I had to quit a few years ago due to health issues. While active I had to remove some truly tough paint, Dupont Imron. Properly applied it is nearly impervious to all conventional paint removers, and is tough enough to resist all but the most aggressive media blasting techniques. The railroads used Imron extensively, including on their air horns.

To remove the stuff I resorted to mixing Dad's Easy Strip with Citristrip. That worked until Dad's took the methylene chloride out of their stripper. I then started adding methylene chloride to the weakened (and near useless) Dad's "safer" formula. You can buy methylene chloride from many industrial paint suppliers.

DISCLAIMER: Methylene chloride is NASTY, DANGEROUS STUFF to deal with. Wear protective clothing, chemical resistant gloves (NOT PLAIN RUBBER GLOVES) and eye protection. Get this stuff in an eye and it's not only incredibly painful, you will most likely lose your sight in that eye. It is also carcinogenic, so limit your exposure. Why use it? Because it works better than any other paint stripper. IF you decide to use it, you're on your own.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann";'87 325is "Odette"; '93 325is "Elvira"; '95 M3 "Ashlyn"; '95 318is "Bebe"

Slownrusty
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Location: Houston, TX

Re: Refinishing BBS RC090 Wheels - Pictorial and Video

Post by Slownrusty » Tue Nov 02, 2021 1:17 pm

@hornhospital - Thanks for chiming in and providing the suggestion on the Methylene Chloride (I'm definitely keeping this tip for the future).

BTW neat hobby restoring locomotive air horns!

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