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Sandpaper Grit question

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  • Member since
    June, 2016
Sandpaper Grit question
Posted by Pwaszak on Monday, March 05, 2018 9:10 PM

Hey all,

Novice here with a question regarding sandpaper. When someone says, 'I sand my coat with 1500 grit sandpaper', what measurement system are they talking about? US? FEPA? Micromesh? Is there an accepted standard that people refer to 9 times out of 10?

Thanks in advance!

Edit: just for reference, I'm researching what grit to sand a primer coat with 


  • Member since
    May, 2017
  • From: ohio I want to leave
Posted by armor 2.0 on Tuesday, March 06, 2018 9:31 AM

I don' know what brand sandpaper your getting but some brands tell you on back of package what different grits are used for like 3m sandpaper look at back tells what different grits are used for.

  • Member since
    December, 2002
  • From: Bury St Edmunds, Suffolk, England
Posted by Bish on Tuesday, March 06, 2018 9:41 AM

The higher the number the finer the grit. For primer you want to work down to very fine polishing cloths starting with around a 1000 and goiung down to about 8000

''I am a Norfolk man, and i glory in being so''


On the bench: Esci 1/72nd MiG 29 (Aircraft of the Commonwealth GB)

  • Member since
    May, 2009
  • From: Poland
Posted by Pawel on Tuesday, March 06, 2018 9:48 AM


Here's a nice article detailing the subject throughly:

Have a nice day


All comments and critique welcomed. Thanks for your honest opinions!

  • Member since
    November, 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Wednesday, March 07, 2018 6:46 AM

I had no idea of the measurement criteria (thanks, Pawal).  But at least here in the states, I have never found a confusion.  All the sandpaper and emory cloth I have ever boughtin a long modeling and car painting lifetime has the same numbering scheme, so just going by the numbers seems to work here.

Don Stauffer in Minnesota

  • Member since
    September, 2006
  • From: Bethlehem PA
Posted by the Baron on Thursday, March 08, 2018 2:15 PM

The grit number is the number of sharp particles per square inch, at least here in the US.

The bigger the government, the smaller the citizen.

  • Member since
    June, 2014
  • From: New Braunfels , Texas
Posted by Tanker - Builder on Saturday, March 10, 2018 8:43 AM

Hi ;

 Hey , Baron , I second that motion !


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