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Machine Polishing Need help with Machine polishing

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Old 09-10-2017, 09:12 AM   #21
scuba-phil
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Are you doing a pre wash/foam?
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Old 09-10-2017, 09:42 AM   #22
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As someone else has mentioned above I'm not entirely convinced a hose down as the initial rinse is man enough - get yourself a PW, probably the best £100 you'll spend.

One way of testing to see if it's the wash process or drying stage inflicting the marring would be to use the drying towel vertically as opposed to horizontally.
If you notice a change in direction of the marring you've found your culprit.

Another option could be to get in touch with a detailer local to you and pop over for them to cast an eye over the whole car and the panel in question - seeing pics/video's on the internet is one thing, seeing the object in person is quite often entirely different.

cheers

Chris
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Old 09-10-2017, 09:48 AM   #23
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Quote:
Originally Posted by scuba-phil View Post
Are you doing a pre wash/foam?
Nope! I was kinda under the impression that this was like an optional extra to aid with the process rather than a necessity
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Old 09-10-2017, 10:54 AM   #24
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Either way you would be better getting yourself a PW and doing a pre wash before you do your 2BW. If your saying that after your correction the paint looked fine but these appeared after your wash then it just could be you and your technique.

Correct a panel or two and then go through your wash routine on the panels and see if you have left any marring. To leave any wash marring you must have very soft paint or hands&arms like Thor. Anyway you will need to machine polish it again to get rid of them or you could just mask them with a filler glaze.
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Old 09-10-2017, 11:50 AM   #25
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Have to agree, that the initial rinse down with a hose simply isn't enough to dislodge enough grime before touching the paintwork. You need a powerhose, prewash and or snow foam for effective safe washing in my opinion.

I've had several people say to me after pre wash and foam while washing, you have no need to wash your car with a mitt ,or sponge as they said, the car is spotless already.
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Old 09-10-2017, 12:10 PM   #26
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Hopefully it's the hands and arms like Thor lol..

Will bare this in mind guys cheers
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Old 09-10-2017, 01:11 PM   #27
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Not sure if this helps, but something I have to constantly remind myself is:

"Stop scrubbing the paint".

Let the wash mitt and the shampoo do the work, and gently glide the mitt over the paint. The more pressure you apply through the mitt, the more likely you are to cause marring.
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Old 09-10-2017, 06:26 PM   #28
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All paint is soft compared to the potential particles of gritty dust being drawn across it. Look into proper pre-washing, in the long run it'll save you huge amounts of time and effort
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Old 10-10-2017, 10:49 PM   #29
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Cheers. Do you think it could explain the issues i'm having? Very short on money so will probably leave it a while but it will bug me over time and have to be corrected lol.
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Old 11-10-2017, 12:41 AM   #30
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Yes I do. Road film is a mixture of diesel, tyre dust, and fine grit, in varying proportions depending on the driving you've been doing. You can shift some of the bigger stuff with a hose, and if you have a pressure washer it's a bit more effective; however the combination of both is leaps and bounds ahead of just using a hose on its own. Even using a decent pre-wash and then a house is still substantially better than just water alone.

The point here being that even with the most careful two bucket method, the plushest wash mitt and the most lubricious shampoo, if you place the mitt on a panel with particles of grit on it, some of those particles will be drawn over the panel with sufficient force to cause marring. An effective pre-wash routine will dramatically reduce the amount of damaging material on the paint when you come to the wash stage. It won't eliminate all wash marring, but it can greatly reduce the likelihood and severity of it.
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