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Thread: Sanding

          
  1. #1
    Registered Member AeroCleanse's Avatar
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    Sanding

    I'm wondering what grits of paper would be a good choice for all around use, buying all of them seems a bit wasteful.

  2. #2
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    Re: Sanding

    Depend on what you are doing?

    Body filller/paint removal sanding-

    80 to 120 DRY-

    DO NOT WET SAND "BONDO"- YOU CAN GET WATER TO SEEP INTO THE SURFACE AND GET SWELLING ON THE REPAIRS AFTER A WHILE.

    block sanding out primer or major paint damage:

    minimum grit of 320 to fine of 400 OR 600 wet sandpaper

    block sanding top coat finishes for repaint

    600 or 1000

    block sanding for polish type work -

    2000 or higher (2500)

    Instead of finger pressure it is better to use a small 2x3 inch flexible blocking pad for paint sanding- wrap a 1/4 sheet around the pad, use lots of water to flush out paint as you go. when done put the wet sandpaper in a dedicated water bucket

    I am sure you will get some folks to suggest a variation of this- It is what always worked for me.

    Warning-- big box store "SANDABLE" primers can take a long long time to dry to really sand- Use a Duplicolor automotive sandable primer or spray gun epoxy type.

    Good luck- consider a 3M assorted pack for paint sanding

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    Registered Member AeroCleanse's Avatar
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    Re: Sanding

    This would be for finished paint / clear coat. So 2000 would be the starting point. Wondering what what be used on plastic lights.

    I'd the Meg's block to go with the Meg's paper.

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    Avatar Czar BlueZero's Avatar
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    Re: Sanding

    First off, I'm not a wet sanding pro, heck not even advanced beginner.

    I have a 3M block and a Meg's block. The 3M one is a softer foam material where the Meg's is more rubbery. I like the 3M one for curved areas like headlights since it conforms a little better. However I like the Meg's one for flat areas because it feels like it spreads the pressure a bit more even.

    I would have to look but I think on the bad headlights I started with 1000 or 1500 grit. Those where ones the you couldn't even see the bulb. I did write up on here somewhere. I'll do a bit of digging for it.
    Scott

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    Avatar Czar BlueZero's Avatar
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    Re: Sanding

    No luck finding the write up. I looked in my gallery and there were no headlight photos either. So either I really didn't do a write up or that was one of the old forums.

    Side note: I've been looking forward to trying some M105 by hand on headlights.
    Scott

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