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Old 08-01-2018, 01:14 PM   #1
jammyc
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Need help with my Bilt Hamber autofoam/Surfex HD prewash technique

Hello

Lurked for many years and learned a lot however i have some questions on my technique which has left me underwhelmed with what are some very good products.

Currently I have a car that 3-4 times a year I seal with Finnis kare 100p however the rest of my detailing is done with Bilt Hamber products.

I was my car every three weeks the method below.

Currently i use Surfex HD on the engine bay and the lower parts of the car as a prewash. Then use auto-foam through a hozelock pressure sprayer on the rest of the car.

On the wheels I use auto wheel.

Finally I use bilt hamber auto wash to get a clean finish.

Now i know these are good products I can see for myself from detailing world they work. But especially after the pre-wash stages there seems to be little cleaning done unless I agitate the dirt with a detailing brush (which I didn't think i needed to do with a contact less wash), this seems to be the case whether or not i use a pressure washer (hence why i use a pressure sprayer).

So my question is what is likely to be the issue here? To get these fantastic contactless washes we see in reviews does the car basically need showroom finish paint (my car's paint is not the best with light scratches)? Do i need to increase thee concentration of the surfex HD and autofoam (both are currently diluted to 3%) can I go much higher without removing the sealant? Or should i let them rest longer before rinsing (currently I leave it 3 mins)?

As an aside i also have a motorcycle with lots of bits which are near impossible to get brushes in without removing the fairings (so contactless wash is probably going to be useful here) is auto-foam going to be good for these applications too? Is there any benefit in using the Surfex HD first?

Thanks in advance.
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Old 08-01-2018, 01:25 PM   #2
Forsh
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Have a read of this...

http://www.detailingworld.co.uk/foru...d.php?t=400542

and this

http://www.detailingworld.co.uk/foru...d.php?t=401047



Last edited by Forsh; 08-01-2018 at 01:27 PM.
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Old 08-01-2018, 01:50 PM   #3
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None of the products has ever been described as a fully "contactless" wash solution, but AF, Surfex and Auto Wheels, however, are very good at removing the bulk of the soiling prior to starting the main wash.

4% PIR is generally regarded as the sweet spot dilution ratio for AF but this can be increased with little effect on your LSP. For cleaning the engine bay I'd would use a much higher ratio for Surfex, maybe up to 10%.
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Old 08-01-2018, 01:59 PM   #4
jammyc
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So that first link is actually what made me ask the question as i saw that thread and thought wow that's not what i see. They are using 4% dilution so I will go to that that is a bit up from my 3%.

The second link was about auto wash which i agree is a great product.
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Old 08-01-2018, 02:31 PM   #5
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Quote:
Originally Posted by neilmcl View Post
None of the products has ever been described as a fully "contactless" wash solution, but AF, Surfex and Auto Wheels, however, are very good at removing the bulk of the soiling prior to starting the main wash.

4% PIR is generally regarded as the sweet spot dilution ratio for AF but this can be increased with little effect on your LSP. For cleaning the engine bay I'd would use a much higher ratio for Surfex, maybe up to 10%.
Thanks it seems i should increase my concentration slightly to 4%
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Old 08-01-2018, 02:35 PM   #6
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I'm not completely clear from your first post, are you using a PW to rinse the Auto Foam off? It will work effectively with a hosepipe and a suitable fan jet, but a PW is needed to get the best effect.
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Old 08-01-2018, 04:07 PM   #7
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Never used Surfex HD, Is it LSP safe?
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Old 08-01-2018, 05:11 PM   #8
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Quote:
Originally Posted by Soapybubbles View Post
Never used Surfex HD, Is it LSP safe?
Depends on how it's diluted but generally yes.

Last edited by neilmcl; 08-01-2018 at 05:13 PM.
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Old 08-01-2018, 05:24 PM   #9
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I'm not completely clear from your first post, are you using a PW to rinse the Auto Foam off? It will work effectively with a hosepipe and a suitable fan jet, but a PW is needed to get the best effect.
So I tried both, at Christmas i used the Nilfisk pressure washer other times i tried the jet setting on the hose. Ideally i would like to get away without needing the pressure washer as where i normally live i cant get one so need to travel to Tescos to use theirs.

It could be that i am not close enough to the car and therefore using the pressure washer to rinse the car rather than drive off the dirt. (I lost a chunk of paint on the bumper from pressure washing an already damaged bit of paint so I am a bit cautious now).
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Old 08-01-2018, 05:30 PM   #10
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Damaged paint aside, you need to be close enough to the paint for the jet to be "bouncing off" rather than just "washing over". I did a "foam and rinse" on my brother's car over Xmas and unfortunately there was a patch on the door where the foam got rinsed off, but we didn't go over it with the high pressure stream, and it was much grubbier than the surrounding.

Thing about a PW is that the flow isn't particularly high compared to a hose, so you need to be close enough to the paint for the pressure to do the work.

Try it next time you're rinsing down the Auto Foam - you'll find you can "write" with the PW in the muck because although the AF will loosen it, it needs water under pressure to drive it off the paint.
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