Mould stains on mohair roof

Technical Area Cleaning & Detailing
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Hi all, I have a problem with what appears to be mould stains across the front 3 inches of my NC mohair roof. It’s above the metal front support cross bar that clips on to the top of the windscreen.

When I release the roof from screen, I can put my hand up above the bar under the mohair cover, and feel some material bonded to the underside of the roof material.  The stains coming through the top of the roof appear to be only above this bonded material.

I have regularly kept to roof clean and have treated with Autoglym cleaner and sealer yearly, so am disappointed this is happening.

Has anyone had experiences of this?  Should I remove the bonded material? Any help appreciated, thanks.

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The staining should not be coming through. “Mohair” fabric is 2 sheets of material with a rubber membrane in between, all bonded together

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Can you post  a picture ? It might be easier to suggest a remedy. Cheers

 

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Thanks ChrisRs for your reply. I cant work out how to post a couple of pictures (feeling a bit stupid!) can anyone give me a quick answer please?  Cheers.

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Try this.  https://www.mx5oc.co.uk/forum/yaf_postst110647_New-Photo-Tutorial-2018.aspx  

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Thanks Mad Malc, I’ve hopefully got it now.

 

Here are a couple of pictures showing the mould marks on the roof.  I have tried cleaning with a soft nail brush and Autoglym mohair roof cleaner with no success. Thanks for any advice anyone can give.

 

 

 

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Looking at it, the mould will need killing off

Use my method and it should be ok again

Antibacterial wash and wet vac is essential:

 

 

How to clean and seal a Mohair Hood

(ChrisRS Valeting & Detailing)

A nice sunny day and not too cold is essential to aid drying

Equipment:

Large car soft bristle wash brush

Nail brush

Wet & Dry Vac … set to wet

Dry vac

Bucket

1" Detailing Brush or 2" NEW Paintbrush

Container for the Sealant

MF cloth

Fabric/Convertible roof sealant…Renovo/Fabsil/ Similar products

 

Method

In the bucket, mix a mixture, using around 100ml of each of the following:

Johnsons Baby Bath or similar

Milton Sterilising fluid, to kill Algae spores

Bilt Hamber Surfex APC or similar All Purpose Cleaner

Warm water to 3" in the bucket

  1. Wash the roof in sections with the soft brush and then lightly with the nail brush to remove ingrained dirt. Do not apply any pressure

  2. Suck out the moisture with the Wet Vac

  3. Allow to dry for an hour in the sun

  4. Dry vac the roof and leave a little longer

When satisfied that the roof is dry…It doesn’t take long…That’s the nature of Mohair,

  1. Pour the sealant into container and apply section by section with a 1" Detailing brush

  2. Each section should be lightly wiped with the MF cloth after each section

  3. Wipe any Sealant off the glass immediately, or mask and cover the windows, prior to starting

 

Your Hood should now look brand new again!!

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Thanks ChrisRs, I will try that in a few days(?) time when the weather is suitable     I’ll get back to you and let you know how I get on.  Cheers, Jeff.

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Can I ask is the Renovo the stuff that is black in colour and is the roof on the Mk3 Mohair ? 

Thanks ??

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The Renovo Reviver product comes in different colours, one of which is black.  It is for any fabric (i.e. not vinyl) roof.

 

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Mmm What I meant was is the product always coloured IE is there a clear alternative ? My roof is fabric and black so I’m assuming the black Renovo is exactly what I should use ? 

Thanks. 

 

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Autoglym fabric roof cleaner and reproofer is clear as I’ve used it on my mohair roof. If your roof is in bad condition then follow the cleaning instructions provided by ChrisR earlier in this post and use the Autoglym product instead.

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