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Re: Wet Sand or Body Filler First???

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Author  [Modern View]

12-29-2012 19:08:33

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Is there a special grit/type sandpaper to use to sand down the bondo smooth to the metal?

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12-30-2012 08:02:14

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 Re: Wet Sand or Body Filler First??? in reply to RTR, 12-29-2012 19:08:33  
I start with 80 and finish with 100. As Stephen said you will have pin holes. I forget the typical stuff I use for pin holes, but I have bought it from Wal Mart, it is cheap. You sand it all off until nothing is left except what is in the pinholes. You don't want to use it to fill small depressions, you either use more body filler or you can use a glaze on shallow ones. The sandpaper grit is not that important as you are going to cover everything with surfacer which will fill 80 grit scratches (I prefer 100 grit). I use 400 grit to wet sand the surfacer, PPG says not to use anything finer to wet sand.

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Stephen Newell

12-30-2012 01:55:21

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 Re: Wet Sand or Body Filler First??? in reply to RTR, 12-29-2012 19:08:33  
I use a random orbital sander to sand the majority of the bondo using 80x paper. When I get close I then use a inline sander with 80x paper to get the rest. Harbor freight sells one cheap that works fine. You could also get a hand block that uses the same paper which is even cheaper. Then inspect the body work and see if there is any pin holes or missed spots. You can either fill them with more bondo or use a glaze however unless you are doing a lot of body work spending 20 to 30 bucks for a tube of glaze may not be a good idea. Then I do a final sand with 220 stearated paper with a sanding block and prime.

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