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-   -   Why do you need to measure the paint before polishing?? (https://xoutpost.com/bmw-related-forums/detailing-forum/60260-why-do-you-need-measure-paint-before-polishing.html)

awesomejun 04-06-2009 05:06 PM

Why do you need to measure the paint before polishing??
 
I have a question.
Why do you need to measure the paint??
Is that for you to choose which polish product you are gonna use??

Thanks.

xx3 04-06-2009 05:52 PM

(from my limited understanding of paint) You measure the thickness of the paint to know how aggressively you can polish the clear coat. If you use a pad thats too rough you'll eat through the clear-coat and damage the paint permanently...

awesomejun 04-06-2009 06:51 PM

Thanks for reply.
Then.. what's the clear-coat?? Is that some kind of layer formed by wax or sealant?? :rolleyes:

detailersdomain 04-07-2009 07:43 AM

the clear coat is the top coat of your paint.

Uses:
- Identify repainted panels and all previous refinish work
- Buff with precision and confidence. Locate where extra work is needed
- Improve finish consistency and quality
- Cut expensive paint materials and costs
- Show customers where more paint stripping or re-clearcoating is needed
- Determine depth of acid rain damage

awesomejun 04-07-2009 12:03 PM

Then... a vehicle after great detailing would have thicker clear-coat?? or thinner??
As far as my understanding...
if the clear-coat(or paint) gets thinner whenever you polish the surface, then too frequent polishing is not really beneficial in terms of long-run maintenance, right ?

thanks.

detailersdomain 04-08-2009 12:16 AM

thinner yes.

correct you can polish too much.

Joe Daher 04-10-2009 09:27 AM

Generally speaking, you don't need to worry about the thickness of your paint if you're just going to polish the car. If, however, you're using a buffer and you're actually going to compound and/or wax the vehicle, you should definitely take things like that under consideration.

In some professional shops, we use paint thickness gauges to show the customers when/if they need to get a wax, because you can tell how many mils (the layers of paint and it's measurement) are left on the vehicle. A vehicle with too many mils is pretty obviously repainted, and might need more upkeep because of this; a vehicle with too few mils will need to be waxed, because the vehicle doesn't have a fresh enough coat of wax.

For residential applications, I wouldn't worry about the thickness of your paint.

awesomejun 04-11-2009 03:44 AM

So like.... it wouldn't be a matter if I polish with Menzerna PO85RD,
but it would be better to consider the thickness when I compound it with SIP..., right??

detailersdomain 04-11-2009 08:48 AM

it would matter but much less, 85rd on an orbital won't do much sip wouldn't either.

I have actually never heard of taking measurements before and after wax....

Joe Daher 04-11-2009 01:54 PM

I wouldn't worry about it unless your using a high-speed buffer to compound your whole vehicle. Under those circumstances, you can identify areas of your vehicle's exterior that might need extra work.

If you're just waxing your car, no, I wouldn't worry about it. If you're hand buffing a scratch off your car with rubbing compound, no, I wouldn't worry about that either.

If you're repainting your car yourself and wetsanding it, then buffing over it for that sparkling finish, then you might want to take it under consideration. ;-)

Truth be told, there are few reasons that people other than professionals would need to guage the thickness of their paint.


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