Exterior Add-On, 2-Year Protection

⚠ UV Oxidation Damage

Your Trim Turned Gray.
We Bring It Back to Black.

Faded, chalky plastic trim makes an otherwise clean car look worn-out. We bring it back to deep factory black and lock it in with a 2-year coating, not a dressing that washes off in the first rain.

Paint sealant application after trim restoration, SF City Wash exterior detailing San Francisco
The Problem

Why Does Black Trim Turn Gray?

Plastic trim doesn’t maintain its color on its own. Without ongoing protection, UV and environmental exposure steadily degrade the surface.

01

UV Oxidation

UV radiation breaks down the polymer chains in plastic over time, destroying the pigment-binding structure. The color fades from the surface out, turning rich black into flat gray.

02

Loss of Surface Oils

Plastic trim contains oils that give it depth and a subtle sheen. Washing, rain, and sun exposure strip these oils out over years, leaving a dry, chalky-looking surface.

03

Dressing Dependency

Many drivers use silicone-based trim sprays that look great for a week, then wash off completely. Without a bonded protective coating, the cycle of fading continues.

Why It Matters

Faded Trim Ages the Whole Vehicle

It is not only cosmetic. Oxidized plastic keeps breaking down, and the longer it sits the harder it is to bring back.

Visual Impact

Gray trim draws the eye immediately on any colored vehicle. It makes a fresh detail look incomplete and a good car look older than it is.

Resale Value

Buyers and appraisers notice faded trim, and on a newer car where the trim should still look factory it reads as a car that was let go.

Restoration Window

Severely degraded or cracked trim may be beyond chemical restoration. Restoring trim while it’s faded but intact is always the right time to act.

Our Process

How Black Trim Restoration Works

Clean it, degrease it, then put on a product that bonds to the plastic instead of sitting on top of it.

STEP 01

Clean & Degrease

We clean all plastic trim panels thoroughly and strip any silicone dressing, wax, or contamination. The coating won’t bond to a contaminated surface.

STEP 02

Light Abrasion (If Needed)

Heavily oxidized or chalky trim may receive a light abrasive treatment to remove the degraded surface layer and expose fresh plastic underneath.

STEP 03

Trim Coating Application

We apply a durable plastic trim coating in controlled passes. The coating penetrates the surface and bonds to the plastic, restoring deep black color.

STEP 04

Cure & Inspect

The coating is allowed to cure. We inspect every trim panel for even coverage and uniform color before finishing. Any uneven areas are corrected immediately.

Recent Work · Inner Sunset

Trim Restoration on an Imported Honda Acty

A Honda Acty parked in the Inner Sunset — a Japanese kei truck, right-hand drive, with a flat cargo bed where a boot would be. It is a 660cc import rather than a compact pickup, and almost every piece of black plastic on it is exposed: the trim strip under the front badge, the mirrors, the door surrounds and the bed furniture. Twenty-one frames on file, four matched before-and-after pairs.

A gloved hand wipes the black plastic trim panel below the red Honda badge on a white Acty kei truck with a blue microfibre cloth.
The Work Itself

Cleaned and Degreased First, Every Time

This is Step 01 on this page, photographed on the job: the front trim strip below the Honda badge being cleaned by hand before anything is applied to it. Coating goes onto bare, degreased plastic or it does not bond.

A kei truck has more exposed black plastic per square foot than most cars on this list, which is why the difference reads across the whole vehicle rather than on one bumper.

Two things this truck did not get. Surface rust on the bed rails and the hinge posts is there in the before frames and still there in the after frames — removing it is not part of a trim restoration and we did not touch it. The headlight lenses are yellowed in both as well; headlight work is a separate job and it was not done here.
Before · Full vehicle White Honda Acty flat-bed kei truck parked on a residential San Francisco street, seen from the front three-quarter before detailing.
After · Full vehicle Clean white Honda Acty flat-bed kei truck parked at a kerb on a residential San Francisco street after detailing.
Before · Front end White Honda Acty kei truck photographed head-on at a San Francisco kerb before detailing, front panel dulled by road grime.
After · Front end White Honda Acty kei truck seen head-on with both doors open after detailing, front panel clean and reflecting the tree canopy.
Close view of a Honda Acty kei truck's front panel with the red Honda badge, wiper arms and black trim strip.

The front trim strip and badge surround, finished.

Close view of a Honda Acty kei truck's black door mirror and A-pillar with clean glass showing the BRIDE seat covers inside.

Door mirror and A-pillar — two of the pieces that fade first on any vehicle.

Corner of a Honda Acty kei truck's flat bed where it meets the cab, showing the headboard rails and hinge post.

The bed corner and hinge post, cleaned. The surface rust on the steelwork here is the same in the before frames — it was left alone.

Every frame from this job, including the ones that did not make this page, is in the Honda Acty kei truck case study.

What’s Included

Black Trim Restoration Add-On

Added to any Exterior Services or Full Package booking. We treat every piece of exterior black plastic trim: bumpers, mirrors, door handles, pillars, and body cladding.

  • Full trim clean and degrease
  • Light abrasion prep on oxidized panels
  • Bonded trim coating application
  • Up to 2 years UV protection
  • All exterior plastic trim included
Note: Trim that is physically cracked, painted, or severely structurally degraded may show partial results. We assess before starting and advise on expected outcome.
Vehicle SizePrice
Sedan / Coupe$75
Midsize SUV / Crossover$75
Large SUV / Truck / Minivan$100

Add-on to Exterior Services or Full Package. Not available as a standalone-only service.

Ready to See Deep Black Again?

Add trim restoration to your next detail. We come to you anywhere in San Francisco.

FAQ

Common Questions

UV breaks down the pigments and oils in the plastic over time, and rain and washing strip the surface further. That gray, chalky look is oxidized plastic. The black is still in the material, it just needs bringing back and then protecting.
The trim coating we apply provides up to 2 years of protection. The protection bonds to the plastic surface and resists UV, rain, and regular washing. Unlike spray dressings that wash off, this is a durable bonded coating.
No. The finish is a natural deep black matte, not a high-gloss greasy dressing. It puts the factory look back rather than soaking the trim in silicone.
In most cases, yes. Faded and oxidized trim responds well. Trim that is physically damaged, cracked, or painted cannot be brought all the way back chemically. We look at it before we start and tell you if the result will be partial.