I have noticed right after buying the car 2 years ago the wheel hub colored insert--ours is White, have a distinct yellow hue--very disappointing regarding
Lexus paint job... no other car I have ever had does this, anyone else notice it?

 

Wheel hub colored insert? I can’t see my wheel hubs behind the wheels.

 

It is the insert that surrounds the wheel hub...it is an insert that is different than the rest of the paint---probably painted separately not with car during paint process

 

Are you talking about the wheel well exterior molding? Also called a fender trim.

 

Is your F-Sport trim with 2-piece brake rotors, with aluminum hat? If so, it is normal for aluminum hat turned yellowish.

 

Yes the external trim piece and I have a 2024 RX luxury

 

Yep I noticed day one that trim color does not match the rest of the car. We have eminent white pearl Premium Plus. Doesn't bother me -my guess is the material is different and probably can't be matched precisely. Still looks much better than unpainted black.

 

Every vehicle I've ever owned has had some minor colour variation from plastic to metal. Some were more pronounced than others.

[From Axalta] There are several factors that could create a perceived color match problem:
1. In the OEM paint process, plastic bumpers are usually painted separately from the main body of the vehicle - often at a different location - because plastic parts cannot withstand the high bake process that metal parts can. The different application processes and substrates (plastic vs. metal) can result in color variation - especially with spray sensitive colors (e.g., light beige metallic). Most often, the difference between the bumper and body is due to flake appearance, darker/ lighter or a combination thereof.
2. The bumper and the fender are often adjoined at slightly different angles. Light reflects differently at different angles, this can give an illusion of a different shade of color.
3. The color of the surfacer or sealer on the body of the car and the bumper are often different. If the basecoat is not applied to black and white hiding on the body, it can create differences in different lighting conditions.
4. The surfacer or sealer on the body of the car and the bumper are different. This difference can affect the surface absorption rate of the base coat color often impacting the metallic flake orientation to look differently. This can create a darker face of the color as well as a lighter side tone.

 

Great explanation. It's not a defect.

 

Useless party factoid: Boats with light colours like white almost always have a black base layer of gel. Dark colour boats almost always have a white base coat. Go figure.

 

That's so that you can easily spot a damaged area that may need repaired.