Wet Sanding Grits Explained

There are a lot of steps to wet sanding paint if you’re goal is exceptional results. Here is each grit, and it’s purpose. 

  • 600 grit is to completely remove any texture or orange peel from the paint. After completion, the paint should be completely flat, with no ripples, no remaining heavy edges, etc. Use True Blox wet sanding blocks, the hard surface of them is required to sand the paint flat. 
  • 1,000 grit is used to completely remove the 600 grit scratches. Dry guide coat is required between these two steps. True Blox wet sanding blocks can also be used in this step. The hard block helps ensure the 600 grit is completely sanded. 1,000 grit is also pretty aggressive, so it will continue to flatten the paint, although do not count on it. 
  • 1,500 grit is the first step of working towards a polishable surface. The main paint of this step is to remove scratches.  A soft wet sanding block should be used.  The second purpose of this step is to make sure the paint is smooth, with no grooves or anything from the more aggressive sanding. Use guide coat before this step as well. 
  • 2,000 grit is to remove scratches.  The paint should be smooth already, leaving the only purpose to get to a finer grit.  Use dry guide coat prior to this step. 
  • 2,500 grit is also to continue removing scratches. This step is also more of an aid in the buffing process. This step is a big key to having less grain in the clear coat after buffing.  Usr dry guide coat prior to this step. 
  • 3,000 grit is to make buffing easier.  The foam tri-zact style sandpaper should be used, by hand, wrapped around a soft wet sanding block. Do not guide coat before this step. 
  • 5,000 grit is optional, and just makes buffing slightly easier.  It should also be used by hand, wrapped around a soft wet sanding block. 


2 comments

  • I was wondering how many coats of paint do you use for this process? Thank you in advance!

    Crystal Didio
  • Does the dry guide coat gum up ,when wet sanding?

    Andrew Teal

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