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Old 22-04-2018, 04:30 PM   #1
BradleyW
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How many microns are typically removed via polishing?

Say a normal softer modern paint which reads between 100 to 200 microns is polished with the following:

Scholl S17 + Orange Hex, DAS6, Speed 5, Mid pressure.
6 full sets of '10 passes', with slow arm movement.

How many microns may have typically been removed?

Thank you.
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Old 22-04-2018, 05:42 PM   #2
f4780y
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It's really not easy to estimate for someone else as so many factors are in play. You should always use a paint depth meter to check before and after, and even if that tells you that you are, for example, removing 5 mics of clear per polishing session, you should never assume that is going to happen each and every time.
Always use a depth gauge and measure it, and check different panels as they can vary quite a bit depending on the car.
Also worth noting, a reading between 100 and 200 mics is far too large a range! You want to know what you are working with to something like an accuracy of a few microns, which is what most decent paint gauges will do.
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Old 22-04-2018, 06:06 PM   #3
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Quote:
Originally Posted by f4780y View Post
It's really not easy to estimate for someone else as so many factors are in play. You should always use a paint depth meter to check before and after, and even if that tells you that you are, for example, removing 5 mics of clear per polishing session, you should never assume that is going to happen each and every time.
Always use a depth gauge and measure it, and check different panels as they can vary quite a bit depending on the car.
Also worth noting, a reading between 100 and 200 mics is far too large a range! You want to know what you are working with to something like an accuracy of a few microns, which is what most decent paint gauges will do.
I don't have a gauge and can't afford one. I have no option but to estimate. I know it's a hard question, similar to how long is a piece of string.

As an estimate, how much clear coat is typically removed under the scenario below?

S17, DAS-6, Hex Orange, Speed 5, Mid Pressure, 10 Passes (slow), Soft paint.

Thank you.

Last edited by BradleyW; 22-04-2018 at 06:08 PM.
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Old 22-04-2018, 06:54 PM   #4
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I did before and afters readings with a thickness gauge on a black MINI.
Swirled as hell when I bought it, used Sonax EX04-06 on a green RUPES pad and refined with a blue finishing pad and DDJ Lime Prime.

Maximum clear coat removal was 2microns.
And the finish was near perfect, not a swirl in sight.
Don't know about soft paint as BMW/MINI is quite hard.

You're never going to get a proper answer without using a gauge and seeing for yourself I'm afraid.

Wonder if you could borrow one from somebody?
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Old 22-04-2018, 09:55 PM   #5
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Quote:
Originally Posted by James_R View Post
I did before and afters readings with a thickness gauge on a black MINI.
Swirled as hell when I bought it, used Sonax EX04-06 on a green RUPES pad and refined with a blue finishing pad and DDJ Lime Prime.

Maximum clear coat removal was 2microns.
And the finish was near perfect, not a swirl in sight.
Don't know about soft paint as BMW/MINI is quite hard.

You're never going to get a proper answer without using a gauge and seeing for yourself I'm afraid.

Wonder if you could borrow one from somebody?
How does your level of cut compare to mine with our chosen combinations?
I'm not sure if my paint is soft. Took 2-3 full sets of passes with my chosen combo to remove swirl marks.
Either the swirls were deep or the paint is a touch harder than I think?

How many passes or sets of passes did you perform on each work area of each panel?
How many passes does S30, Hex White require to fully brake down and jewel up?

Thank you.

Last edited by BradleyW; 22-04-2018 at 10:09 PM.
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Old 22-04-2018, 10:57 PM   #6
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You are trying to turn an art into a science, it doesn't work that way. There is literally no way to estimate what you are asking, and if there was that would be dangerous as in a game of microns a "guess" is suicide.

Your better question would be "am I safe to proceed", as that doesn't depend on combos, pads, polishes, others input, but you making a conscious decision on what is in front of you at that time.
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