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Taking it to a car wash is not recommended unless you don’t care about your paintwork. Better off doing it all by hand.

This is an interesting discussion tbh. Personally, I kindasorta do care about my paintwork, but life's too short to spend my days obsessing over ever scratch and swirl.

I'm sure taking your car to a car wash (a hand car wash, not a machine, I'm not an animal) for a decade won't do anything that a paint correction can't fix at the end.

With that in mind, do I wash my car fastidiously every week to keep the paint all fresh'n'blingy, or simply take it for a paint correction once a year? Which is cheapest and most time consuming?


PS - what car is it?
 
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You don't have to wash a car every week to keep the paint work looking good, you just need to wash it safely by minimising the damage done via a contact wash.

I would never use a hand car wash, not only because I don't want swirl marks (and I saw first hand on my girlfriend's car last weekend, the swirl marks in her paint because she has it washed at a garden centre), but a vast majority of these hand car washes are basically run on modern day slave labour that I simply refuse to support.
 
Wait, you're telling me you're going to all this effort for a smart car?

Really?

Could be a ford fiesta for all it matters. It is his car and he takes pride in it by cleaning it. Should be giving praise instead of looking doing at him for cleaning it. Even moreso because it looks like he's having to clean it in the underground car park
 
no i meant, not a lot of information around the worx hydroshot for pre wash (especially with BH autofoam which i have)

I just went with what was on the Internet/bottle. It said 100ml of product for every 500ml of water. Therefore 300ml only needs 60ml of product.

You should just check what the bottle of your foam suggests and mix it appropriately bearing in mind the soap bottle only contains 400ml.

The one bottle of soap/water got me through the entire car and there was very little left in the bottle after I’d done it.
 
Not sure why polished bliss would have the incorrect details but those ratios aren't correct. The manual is available on the bilt hamber website: here

The bilt hamber foams require calculating what they call "panel impact ratio" (PIR) when used in a foam lance. I had to do this today by filling my lance bottle with water and running the pressure washer into a bucket until the lance bottle emptied. The total volume of water that is collected in the bucket has to be measured and multiplied by 0.04 to get the volume of product to pour into the lance. Then you top up with water to fill the lance bottle.

In my case, I got roughly 12 litres out before the lance bottle drained. Multiply 12000ml by 0.04 = 480ml. So 480ml of auto foam should have gone in plus 520ml of water. It sounds like a huge amount but the calculation factors in the high amount of dilution from the water flowing from the pressure washer. I actually mucked it up in my attempt to halve it as I put in 240ml and then accidentally topped it up to 1L without thinking about it. It was still remarkably effective, so I take the 4% as a maximum and am quite happy to reduce it down to around 2% which will make the bottle last longer.
 
The bilt hamber foams require calculating what they call "panel impact ratio" (PIR) when used in a foam lance. I had to do this today by filling my lance bottle with water and running the pressure washer into a bucket until the lance bottle emptied. The total volume of water that is collected in the bucket has to be measured and multiplied by 0.04 to get the volume of product to pour into the lance. Then you top up with water to fill the lance bottle.


I just glug 1-2 inches of autobrite magifoam in the bottom (whatever it ends up at, I dont care) top up with water and get going. Does an excellent job without the faff :D

Also works better in sunlight as the thick foam doesnt cause it to dry on the paint as you can sometimes get with bilt hambers.
 
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