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Mercedes SL550: A Full Restoration, Start to Finish

Multi-stage correction achieving greater than 95% defect removal, interior restoration, and a ceramic coating. One of the most involved jobs we have done.

By Aaron GrantUpdated

Mercedes SL550 exterior after full paint correction and ceramic coating

This is the best result we have achieved on a car, and it is not the result most cars can get.

Greater than 95 per cent defect removal is the top end of what is achievable. It required full multi-stage correction, and it was only possible because this particular vehicle had the clear coat thickness to support that much work.

Most people doing a standard single or two-stage polish see about 50-60% of defects removed. On newer cars, expect less rather than more, because modern paint is thinner. Both numbers are true, and quoting the first without the second is how customers end up disappointed.

What the car arrived like

An SL550 with years of accumulated paint damage. Swirl marks throughout, deeper scratching in places, and the general dullness that comes from a long life without correction.

The interior needed work as well, particularly the plastics and trim, which had faded and stiffened in the way they do over time.

Mercedes SL550 paintwork before correction, showing scratching and swirl marks
Before. Scratching visible across the panel under inspection lighting.

The process

Not a fixed number of stages, despite how these jobs usually get described. It went where the paint needed it to go.

  1. Inspection

    Under proper lighting, establishing what the paint actually was, how much clear coat there was to work with, and how far correction could safely go. This is what determined everything that followed.

  2. Wash and decontamination

    Full decontamination including clay bar and tar removal. Correction over a contaminated surface just drags contamination around, so nothing else can start until this is done properly.

  3. Correction

    Multiple stages, working progressively rather than aggressively. The aim at each stage was to remove as little clear coat as possible while still levelling the defects.

  4. Polishing and refinement

    Refining the surface after the cutting stages, which is what produces the clarity rather than just the flatness. Inspection again here before anything went on top.

  5. Coating

    Applied over corrected paint, panel by panel. Because the correction came first, what the coating preserved was the restored finish rather than the original damage.

  6. Final inspection

    Checking the whole car again under lighting rather than signing it off in the driveway.

Inspection appears three times in that list. That is deliberate, and it is most of the difference between a good result and a rushed one.

The same Mercedes SL550 panel after multi-stage correction, reflecting evenly
After. The same panel, with the scratching removed and the surface levelled.

The interior

The plastics and trim had faded and hardened, which is normal on a car of this age and difficult to reverse convincingly.

Interior plastic trim before restoration, showing fading and surface degradation
Interior trim before. Faded and dried out, which is where most older interiors end up.
The same interior plastic trim after restoration
The same trim after restoration.
Mercedes SL550 interior complete after full restoration
The finished interior.

Why this result is not the normal one

Worth being specific, because case studies are where expectations get set unrealistically.

The paint could take it. Multi-stage correction removes more clear coat than a single stage. This car had enough to spend. Many do not. Gauge readings on 2017 cars have come back as low as 1.9 mil, which is about 48 microns for the entire paint system, against about 70 microns for a human hair.

The time was justified. Multi-stage work on a whole vehicle is a significant undertaking, and the cost reflects that. On most daily drivers it is not the sensible choice.

Perfect paint is rarely the goal. Unless a car is going to a show, chasing the last few per cent usually costs more than the visible improvement is worth, and it spends clear coat you cannot get back.

What the coating contributed

The correction produced the finish. The coating is what keeps it.

Without it, the restored paint would start accumulating marks again from the first wash, on the same timeline it did originally. With it, the surface is harder, easier to clean, and protected against the UV and chemical damage that does most of the long-term harm.

That is the whole relationship between the two, and it is why the order matters. Our paint correction article covers it properly.

"Aaron at Glossworks did an amazing job on my car, both inside and out. Feels and looks like it's brand new. Even the steering wheel looks great (I thought it was sun damage but Aaron managed to spruce it up)."

— Liam Galbreath

What this costs

Work at this level is quoted per vehicle, because the correction is the variable rather than the coating.

For reference, standard coating pricing on a sedan is $960 for White and $1,440 for Black, both including full decontamination and light polishing. Correction beyond that typically starts around $500, with multi-stage work scaling from there. Full pricing is in our cost guide. Our pricing calculator will give you a figure for your own vehicle straight away.

A note on the photos

Every image here is this car, photographed during the job.

There is no stock photography anywhere on this site. When you see a before and after on these pages, it is a real customer vehicle and a real result, which is worth saying because a good deal of detailing imagery online is neither.

Wondering what your car could look like?

Every vehicle is different, and the paint sets the ceiling. We will look at it properly and tell you what is realistic.

What happens next: Free consultation → Transparent estimate → Professional application → Follow-up care

Common questions

How much defect removal did this job achieve?
Greater than 95 per cent, which is the top of what is achievable and required full multi-stage correction. That is not the normal outcome. Most people doing a standard single or two-stage polish see about 50 to 60 per cent, and on newer cars expect less because the paint is thinner.
How long did the job take?
Considerably longer than a standard coating job, which is a full day at six to ten hours. This was one of the most involved jobs we have done, with multiple correction stages, interior restoration, and inspection at every step rather than only at the end.
Could my car get the same result?
It depends entirely on the paint. This vehicle had the clear coat thickness to support multi-stage correction. Many cars, particularly newer ones, do not. The inspection is where that gets established, and it is the limit on what any job can achieve.
What did it cost?
Work at this level is quoted per vehicle rather than from a price list, because the correction is the variable. For reference, standard coating pricing on a sedan is $960 for White and $1,440 for Black, with correction quoted separately from around $500 depending on what the paint needs.
Are the photos of this actual car?
Yes. Every photo on this site is our own work, on real customer vehicles. There is no stock imagery anywhere on the site.