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Old 11-11-2018, 09:59 PM   #1
Chris Donaldson
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Greenstar vs green algae!

I've been asked to clean up - I'm not going to say detail as I'm not going into it too much, a van that my wife's work has. It's been sat for about 3 months under a tree in their car park and is in a right state. They had no use for it but now are looking for a new member of staff so want it cleaned and made roadworthy for them. I've had to put a new battery in it and it needs a new tyre and an electrical fault sorted but apart from that it's sound. The outside is a real mess though.

I've bought some Koch Chemie Greenstar which I've not used yet. I'm thinking of a dilution ratio of about 20:1 to shift this. What do people with more experience of this product advise?

It's dark outside but I took a couple of pics to give you an idea of what I'm up against.



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Old 11-11-2018, 10:23 PM   #2
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I'd be hitting that with a 1:5 ratio
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Old 11-11-2018, 10:30 PM   #3
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I'm obviously not worried about any form of LSP being removed as there is none but I take it at that strength it's not likely to damage the paint?
I only ask as my Dad spayed neat G101 on bugs on the front of his car once and the paint changed from red to a bleached white permanently. He had to get it resprayed. It was stupid, the guy that gave him it didn't tell him anything about the product other than it's a great bug remover.
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Old 11-11-2018, 10:31 PM   #4
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Not used greenetar yet but I'm thinking 50:50 or is that too strong?
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Old 11-11-2018, 10:35 PM   #5
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I'd be happy with 50:50 as long as I'm not going to cause any damage.
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Old 11-11-2018, 10:38 PM   #6
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Originally Posted by Chris Donaldson View Post
I'd be happy with 50:50 as long as I'm not going to cause any damage.
I don't think you could do anymore damage than how it it looks like already, Greenstar should improve it no end.
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Old 11-11-2018, 10:38 PM   #7
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I would be looking 250ml in snow foam lance and good 5 min dwell and go from there
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Old 11-11-2018, 10:38 PM   #8
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Greenstar vs green algae!

Max strength for GS is 1:3, so 25%; says so on the spec sheet.

But if you’re spraying directly, then 1:10 is all that you should need. If you need to do it twice on problem areas, then that’s better than spraying the whole car with too strong a chemical.

If you really don’t care, take it to the local £5 car wash and pay them double. Then clean up anything they’ve missed.


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Old 11-11-2018, 10:42 PM   #9
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Be aware that with most APCs when increasing the strength, eventually diminishing returns set in (and using too strong a solution results in reduced effectiveness).


50/50 is far too strong and a waste of product.


I would not go any stronger than 1:3 (i.e part APC to 3 parts water).
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Old 11-11-2018, 10:42 PM   #10
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Quote:
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Max strength for GS is 1:3, so 25%; says so on the spec sheet.

But if you’re spraying directly, then 1:10 is all that you should need. If you need to do it twice on problem areas, then that’s better than spraying the whole car with too strong a chemical.

If you really don’t care, take it to the local £5 car wash and pay them double. Then clean up anything they’ve missed.


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Slightly off topic, for normal dirt and grime, say all year including winter grime, would 1:6 be OK? Reason I'm asking is that I'm yet to use greenstar, I have a bottle unused and plan to use it .
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