Residue on Machined Rims?
Results 1 to 7 of 7

Thread: Residue on Machined Rims?

          
  1. #1
    Registered Member
    Join Date
    Jul 2020
    Location
    Maryland
    Posts
    2
    Rep Power
    1

    Residue on Machined Rims?

    Hey folks,

    I have a little issue with some machined rims that I'm hoping someone more knowledgeable than I could help me with before I cause more damage.

    I have a set of Starr 718 Gatsby's, black with a machined face that I've owned for roughly 5 years now. I pulled them out this weekend and noticed there was this residue - I guess you'd call it - in spots on the machined surface. Pics below show a few spots on just 1 of the rims. As far as I can tell it only exists on the machined surface and not at all on the painted black portions. Before I go scrubbing at these with every chemical and compound known to man, anyone have any idea how I might be able to get rid of this, and how I might avoid it in the future?

    Here's the backstory, if it helps: The rims were last on the car in the summer of 2018, when I had to remove them and put the stock wheels back on in a hurry (unrelated issue). In my haste, I put them away without much more than a quick rub down. I had intended on coming back the next day and doing a more thorough cleaning, but a combination of life and laziness (mostly laziness) prevented that from ever happening. I fully believe that not going back to clean them caused the issue, because it wasn't present beforehand. Any suggestions for someone that doesn't know much about detailing?

    Let me know if I need to make the pictures bigger. TIA.





    Last edited by Walterfs; Jul 27th, 2020 at 02:27 PM.

  2. #2
    Registered Member Murr1525's Avatar
    Join Date
    Oct 2004
    Location
    Pittsburgh, PA
    Age
    39
    Posts
    19,195
    Rep Power
    237

    Re: Residue on Machined Rims?

    Yeah, bigger images would be great.

    Do you know if there is a clear coat, or bare metal, or chrome?

    Can you feel it like a residue raised on top, or etched down in?

    Did you do any wash or wheel cleaner yet?
    2017 Subaru WRX Premium - WR Blue

  3. #3
    Registered Member
    Join Date
    Jul 2020
    Location
    Maryland
    Posts
    2
    Rep Power
    1

    Re: Residue on Machined Rims?

    Larger images added to the original post.

    I'm not sure about the clear coat. I've never added anything to them and I couldn't find too much info about it online when I was looking, but it probably doesn't help that this particular set is discontinued.

    On the spot in the first image I could feel the residue when I ran my finger over the spot, it felt like the residue was a layer sitting on top of the rim itself. The other 2 spots, at least in these images, it was less noticeable of a texture but it still felt like it was on top of the material, not etched into it. I'm hoping that's a good thing.

    And, historically, I mostly only used water and a microfiber wash mitt to clean them (mitt was used exclusively on the rims, not on car paint or with the solution used on the rest of the car). That last summer, I did begin using Car Guy's Wheel and Tire Cleaner, but it never had an effect that appeared before pulling these out this weekend. Then, finally, prior to taking these photo's I did hit this rim again with the Car Guy's, and did a second round on these spots but it didn't even appear to touch the residue. I haven't used anything else yet because I wouldn't even know what to start with and didn't want to end up causing more damage without consulting someone with more knowledge.

  4. #4
    Registered Member Murr1525's Avatar
    Join Date
    Oct 2004
    Location
    Pittsburgh, PA
    Age
    39
    Posts
    19,195
    Rep Power
    237

    Re: Residue on Machined Rims?

    Do you have any paint cleaner, like Ultimate Compound?

    If you apply it to the silver part, and cloth stays clear, then it is clear coated. If the cloth turns black, it is bare metal.

    But that is also what I would try applying to a small area first. Be careful not to just rub your finger in one spot... Work a small test area, like the spot in the last pic.
    2017 Subaru WRX Premium - WR Blue

  5. #5
    Registered Member Old Bear's Avatar
    Join Date
    Dec 2015
    Location
    San Juan Capistrano CA
    Posts
    691
    Rep Power
    11

    Re: Residue on Machined Rims?

    It almost looks like there might have been bugs, like slugs, crawling around. They may have left their digestive fluids. Notice that it always seems to start near an edge. The texture of the spoke vs painted rim could cause an increase in secretion.

  6. #6
    Michael The Guz's Avatar
    Join Date
    Jul 2013
    Location
    Lawndale, CA
    Posts
    5,578
    Rep Power
    65

    Re: Residue on Machined Rims?

    Looks like the clear coat has been compromised.

  7. #7
    Manager - Meguiar's Solutions Hub Brian Hann's Avatar
    Join Date
    Feb 2005
    Posts
    551
    Rep Power
    21

    Re: Residue on Machined Rims?

    Quote Originally Posted by The Guz View Post
    Looks like the clear coat has been compromised.
    Agreed. Unfortunately this looks like the finish has failed. There is likely no real fix for this other than refinishing.
    Brian Hann
    Manager - Meguiar's Solutions Hub
    Meguiar's Inc.
    Irvine, California
    bhann@meguiars.com
    (800) 854-8073 *3870

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Black Finish Wheels with a Machined Lip
    By Swift457 in forum Detailing 101
    Replies: 5
    Last Post: Aug 22nd, 2011, 04:42 AM
  2. What wax to use for painted/machined clearcoated wheels?
    By Metro_Koormey in forum Detailing 101
    Replies: 5
    Last Post: Jan 19th, 2011, 03:44 PM
  3. Machined Wheels
    By misl302 in forum Detailing 101
    Replies: 5
    Last Post: Sep 2nd, 2008, 09:13 AM
  4. machined wheels
    By skeeter in forum Detailing 101
    Replies: 4
    Last Post: Nov 4th, 2006, 12:27 PM
  5. Machined vs. Polished aluminum?
    By cthomas in forum Detailing 101
    Replies: 10
    Last Post: Jun 5th, 2005, 09:04 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •