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Spotty Motorhome

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Old 21-07-2013, 11:38   #1 (permalink)
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Default Spotty Motorhome

I have some black and brown spots on the GRP bodywork of my MH and have had some success using Autoglym Tar etc Remover. But some won't budge. I can loosen some with my finger nail (I know that's not a great idea but it shows that they are removable) and then the Autoglym removes the rest...........sometimes!

I'm beginning to suspect that some are air-borne pollution as we appear to have them on our bins and on some plant leaves.

Anyone have an infallible suggestion?
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Old 21-07-2013, 12:39   #2 (permalink)
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I have some black and brown spots on the GRP bodywork of my MH and have had some success using Autoglym Tar etc Remover. But some won't budge. I can loosen some with my finger nail (I know that's not a great idea but it shows that they are removable) and then the Autoglym removes the rest...........sometimes!

I'm beginning to suspect that some are air-borne pollution as we appear to have them on our bins and on some plant leaves.

Anyone have an infallible suggestion?
You are correct! It is called Industrial Fallout. There are fall out removers, but the best solution is an acid bath. You really need an expert to do this, and someone who knows how to acid bath a car properly. Needs to be done in the cool, and not allowed to dry, put on, take off straight away. Need to double-glove too as it is hydrofluoric acid which soaks into your skins and eats your bones - the same as fallout remover, so you need to glove up for both - but do double glove - one set is not sufficient!

Once off, buff and polish - keep waxed every 4 weeks minimum and you will avoid all fall out/black streaks and flies will fall off.....you also find the dealer will give you more money come trade in!
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Old 21-07-2013, 16:39   #3 (permalink)
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You are correct! It is called Industrial Fallout. There are fall out removers, but the best solution is an acid bath. You really need an expert to do this, and someone who knows how to acid bath a car properly. Needs to be done in the cool, and not allowed to dry, put on, take off straight away. Need to double-glove too as it is hydrofluoric acid which soaks into your skins and eats your bones - the same as fallout remover, so you need to glove up for both - but do double glove - one set is not sufficient!

Once off, buff and polish - keep waxed every 4 weeks minimum and you will avoid all fall out/black streaks and flies will fall off.....you also find the dealer will give you more money come trade in!
Ooerr, sounds a bit drastic We're beginning to get somewhere, it's a team effort. The Autoglym Tar etc Remover has turned some to powder overnight and today. Many are now dissolving under water and washing up liquid. It's going to take a few more days of soaking and wiping, followed by your recommendation of a good polish methinks
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Old 21-07-2013, 17:54   #4 (permalink)
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Hi, John, have you tried the old faithfull WD40? cleans most sticky stuff, apply a few times and it should work. I have cleaned tar off before with it.
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Old 21-07-2013, 18:17   #5 (permalink)
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Have a look here http://www.detailingworld.co.uk/forum/index.php for fall out removers
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Old 21-07-2013, 18:30   #6 (permalink)
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Industrial Fallout? Isn't that a trade union dispute?

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Old 21-07-2013, 19:04   #7 (permalink)
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Hi, John, have you tried the old faithfull WD40? cleans most sticky stuff, apply a few times and it should work. I have cleaned tar off before with it.
Cheers, Dave
Yes I've heard about that Dave, but have yet to try it. The van was so clean I baulked at squirting oil on it.......but perhaps I'll give it a go tomorrow
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Old 22-07-2013, 06:42   #8 (permalink)
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Ooerr, sounds a bit drastic We're beginning to get somewhere, it's a team effort. The Autoglym Tar etc Remover has turned some to powder overnight and today. Many are now dissolving under water and washing up liquid. It's going to take a few more days of soaking and wiping, followed by your recommendation of a good polish methinks
It isn't as drastic as you think! I would avoid leaving tar remover on there as it may stain or damage the gel coat as it is a solvent based product.

If you want to give the acid bath a go, follow these instructions;

GLOVE UP!

You can use alloy wheel cleaner (an acid, sometimes hydrofluoric, sometimes hydrochloric)

Have available - one clean cloth, One wet chamois (damp), Polish and cloth, razor blade.

1. Spray Acid onto clean cloth, make wet. Wipe over infected area

2. Wipe off quickly with damp chamois

3. Apply polish

3a (if stubborn, using weight of blade only, gently slide across mark on body)

4. Buff off polish immediately.

Done!
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