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Old 02-07-2017, 07:31 PM   #1
mt8
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Cleaning convertible roof.

Hi just bought a new BMW m240i convertible and not sure how to wash the car, can you shampoo the roof? I don't want to damage the water resistance of the soft top or affect the overall look of the fabric.

Any help/ tips greatly received
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Old 02-07-2017, 07:46 PM   #2
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Thanks for posting this, will be watching for more expert replies. the convertibles that I have owned have never been so very dirty, I didnt shampoo them apart from a twice a year wash and recondition with the Autoglym kit. When the car was washed the roof was simply wiped over with a damp towel, and that looked enough.

Mrs GP has a Golf convertible that is 5 years old, no issues with the roof and still looks new.

Could I add to the thread? Is there a better 2 pack kit than the Autoglym?
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Old 02-07-2017, 09:17 PM   #3
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I have a 240i vert also mt8.

I carry detailing products in the boot to clean off bird poop if it happens.

For the roof, I've used a soft brush and a shampoo mix to clean the roof with no issues whatsoever.

I'm just about to apply Gtechniq i1 on the roof as a coating.
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mt8 (03-07-2017)
Old 02-07-2017, 10:00 PM   #4
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Are there any issues about product running off the roof and making a mess on the body? I recall seeing an Astra convertible which had a more plastic roof, the bodywork looked a mess after the first rain following some treatment.
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Old 02-07-2017, 10:48 PM   #5
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Shampoo once every six months unless its really dirty.

I've recently cleaned and proofed my convertible roof with 303 Fabric Cleaner and 303 Fabric Guard.

Repels water beautifully.

I just hose it down and pat it dry with the MF drying towel.
The towel soaks up any beads that are on the surface like a magnet.
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Old 03-07-2017, 04:08 PM   #6
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I hoover our convertible roof with the curtain brush attachment every so often, a dry brush with a fine, natural bristle brush is also good, going with, not against, the weave.
Remove poop asap.
You can wash with ph neutral car shampoo and a sponge/mitt - wool mitts leave residue sometimes (aka wool).
Worth reproofing it every 1-2 years depending on use - if you pat it with your hand you can make most of the water bounce off and run away. Its fun at least...
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Old 03-07-2017, 05:33 PM   #7
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Did my M3 some time ago now.Used Autoglyms convertable pack[about £22]with sponge,cleaner and proof in it.Did look and do the job very well i thought.
My Merc C Class i took more time over a few days ago.
A warm dry day i dampened the roof and brushed it with a soft brush[look at the weft and weave]NOT brushing against the grain.Look carefully how the grain/weave runs on the roof and brush the way it runs.Its not rocket science and you should see what i mean.IF[as mine didnt]it needs a good cleaning.Use a PH neutral cleaner/soap/wash.Rinse it down after and wait for it to be just damp.I then used Fabsil Gold[masked out windows and area not being done first.Leave to dry in open air and your done.Took me about three hours.
The effect is so cool when water sits on it in beeds/balls and then jumps off.

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