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Old 13-07-2015, 02:36 PM   #1
Spy
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Question Cabriolet Roof - Help !

Hi all,

The red roof on my 2008 A3 cab has developed some green gunk/mildew/moss/thing which I want to clean off.

I tried the Autoglym cab roof cleaner with the supplied sponge but it doesn't seem to work.

In the past, before the mildew problem, I tried using the Renovo cleaner but I ended up with dark patches. Not sure where I went wrong with that.

Any advice on:
a) how to remove the mildew ?
b) Tips on cleaning/proofing to avoid patches and streaks ?

Also, would using a Jet wash on the roof help in any way with the mildew problem. I am a bit loathe to try it before getting some advice from you guys.

Thanks for any help and advice
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Old 13-07-2015, 02:37 PM   #2
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This should help ya:

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Old 13-07-2015, 02:49 PM   #3
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Bilt Hamber Surfex HD and a soft bristle nail brush...
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Old 13-07-2015, 03:27 PM   #4
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Thanks for the posts.

Does Surfex HD have mildew resistant properties to protect from future contamination ?

Also, how much better is it than AG or Renovo ?

Now that I have watched the video maybe the answer is using Removo/AG with a brush as opposed to a sponge ?

Finally, how can I avoid getting dark patches after the cleaner dries which is what happened the first time ?
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Old 13-07-2015, 03:46 PM   #5
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Any decent APC and / or car shampoo with a stiff brush should be all you need.

You will however need to reproof your hood afterwards, use Renovo or Fabsil/
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Old 13-07-2015, 03:47 PM   #6
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Have a look on eBay for some magic sponges. I quite surprised the owner of
this car with how well they worked, see post #23, especially as nothing more
than warm water was involved.

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Steve
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Old 14-07-2015, 09:47 AM   #7
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Never came across a magic sponge before but just looked it up - sounds amazing.

My concern is that:
- it may be too abrasive for a fabric (as opposed to vinyl) roof
- It won't have any chemicals to kill the spores
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Old 14-07-2015, 01:50 PM   #8
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Quote:
Originally Posted by Spy View Post
Hi all,

The red roof on my 2008 A3 cab has developed some green gunk/mildew/moss/thing which I want to clean off.

I tried the Autoglym cab roof cleaner with the supplied sponge but it doesn't seem to work.

In the past, before the mildew problem, I tried using the Renovo cleaner but I ended up with dark patches. Not sure where I went wrong with that.

Any advice on:
a) how to remove the mildew ?
b) Tips on cleaning/proofing to avoid patches and streaks ?

Also, would using a Jet wash on the roof help in any way with the mildew problem. I am a bit loathe to try it before getting some advice from you guys.

Thanks for any help and advice
Hi,

If the green has taken hold of the roof it may need a few cleaning attempts to get it back to original colour. A good tip is to agitate and then cover the roof still ramp roof with a plastic sheet to keep it damp and leave it for a few hours or over night. The biological element of the cleaner will keep on working and continue to remove the green. The key with a roof (as with all areas of the car) is to clean it a little and often, that way the dirt/green won;t be able to take hold. If you are still having issues give us a call and we can talk it through with you.
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Old 14-07-2015, 01:58 PM   #9
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The sponges are far from abrasive. Their cleaning power means that you can
substantially reduce the use of harmful chemicals. The sponges work wonders
on hard plastics too. Note that you need a bunch because the abrasion
dissolves the sponge from under your fingers. At around 2p a sponge, they
are now a vital part of my cleaning armoury. Just the sponge and a beaker of
warm water

Regards,
Steve
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Old 14-07-2015, 11:44 PM   #10
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Thanks for all the suggestions. I will give some of these a go.
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