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911uk

Underside Cleaning Advice

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15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHUnderside Cleaning Advice

Leading reported evidence

Use pressure washer and scrubbing brush

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I have used a pressure washer and scrubbing brush with the likes of Gunk, Auto Glym engine cleaner and Meguiars APC, but I am still struggling as the photo will show.

Original post Read captured discussion
Underside Cleaning Advice
Frequently discussed work

Clean oil stains

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The main thing is that it is stated that it is for cleaning oil stains.

Original post Read captured discussion
Underside Cleaning Advice
Read full discussion summary

Leading evidence: 'Use pressure washer and scrubbing brush' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean oil stains' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 15 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Clean oil stains

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The main thing is that it is stated that it is for cleaning oil stains.

Original post Read captured discussion
Underside Cleaning Advice

Clean too

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I've found TFR and clean brake cleaner + plenty of elbow grease get's the ally clean too.

Original post Read captured discussion
Underside Cleaning Advice

Recommend any products or techniques

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Can anyone recommend any products or techniques to help remove the baked on oil/dirt on the underside of my C4?

Original post Read captured discussion
Underside Cleaning Advice

Use jet wash patio cleaner inverted

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I,me sure I have seen on YouTube someone using a jet wash patio cleaner inverted.

Original post Read captured discussion
Underside Cleaning Advice
Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Clean oil stains

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

The main thing is that it is stated that it is for cleaning oil stains.

Original post Read captured discussion
Underside Cleaning Advice

Clean too

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I've found TFR and clean brake cleaner + plenty of elbow grease get's the ally clean too.

Original post Read captured discussion
Underside Cleaning Advice

Recommend any products or techniques

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

Can anyone recommend any products or techniques to help remove the baked on oil/dirt on the underside of my C4?

Original post Read captured discussion
Underside Cleaning Advice

Use jet wash patio cleaner inverted

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

I,me sure I have seen on YouTube someone using a jet wash patio cleaner inverted.

Original post Read captured discussion
Underside Cleaning Advice

Use ordinary dishwashing detergent

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

To remove such dirt, you can try using an ordinary dishwashing detergent.

Original post Read captured discussion
Underside Cleaning Advice

Use pressure washer and scrubbing brush

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

I have used a pressure washer and scrubbing brush with the likes of Gunk, Auto Glym engine cleaner and Meguiars APC, but I am still struggling as the photo will show.

Original post Read captured discussion
Underside Cleaning Advice
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • 911uk: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

For the rest of the underside a long handled brush, TFR and a RSI did the trick.

Original post Read captured discussion

No unique explicit quoted action; no causal link assigned

Generation: 20261027T175704Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi all Can anyone recommend any products or techniques to help remove the baked on oil/dirt on the underside of my C4? I have used a pressure washer and scrubbing brush with the likes of Gunk, Auto Glym engine cleaner and Meguiars APC, but I am still struggling as the photo will show. Any advice would be greatly appreciated :thumb:

POST 5Original post

I,me sure I have seen on YouTube someone using a jet wash patio cleaner inverted. Never tried it but thought it was a good idea.

POST 6Original post

Isn't that light brown stuff the original colinite that was applied by the factory :?:

POST 7Original post

drive it more and in the rain. wont have to worry then

POST 8Original post

Soda blasting looks good for the ally. I've found TFR and clean brake cleaner + plenty of elbow grease get's the ally clean too. For the rest of the underside a long handled brush, TFR and a RSI did the trick.

POST 9Original post

That light brown stuff looks like the original Porsche coating. No need for that to come off other than for display purposes? Brake cleaner quite effective on oily stuff. I also use Bilt Hamber degreaser stuff (forget the name), followed by some corrosion protection.

POST 10Original post

Bilt Hamber Surfex HD is the best degreaser / all purpose cleaner that I've used.

POST 11 / ORIGINAL POSTEROriginal post

Could be, I didn't think of that!

POST 13Original post

To remove such dirt, you can try using an ordinary dishwashing detergent. Such products are good at removing oils, so you can try them. If this does not help you, then as an option, you can try expensive detergent analogues. These can be different brands of cleaners. The main thing is that it is stated that it is for cleaning oil stains. If even that option doesn't work for you, then you can use Sparkle Wash Upstate . For me, it's an excellent way to deal with issues I'm not as good at as I'd like to be. Have you had any luck yet?

POST 14Original post

Dry ice cleaning is quite strangely hypnotic. Bit expensive though. https://www.instagram.com/theblastsmith/?hl=en

POST 15Original post

And with all that CO2 released, it's VERY bad for global warming

This is a source reference. Confirm exact model applicability in the original material.