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Old 01-09-2008, 01:55 PM   #1
thfc1799
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Wet sanding?

Ok I'm not sure if this is in the right section or not but here goes....

I've never tried wet sanding before so I figured I'd give it a shot. I want to paint my side mirrors, I got them off, cleaned them up, roughed them up, and then sprayed my primer. Now, I layed about three thin coats of color on, and attempted to wet sand. (2000 grit sand paper, left in a bucket of water with a drop of soap for about 10 mins, while sanding I kept the water running on where I was sanding. I used a block with the paper, and didn't apply a huge amount of force.) Now, when I got done, the piece looked spotty/patchy/ kind of chalky.... kind of like the primer was coming through.... So I figured I had sanded through the color.... I proceeded to add about 4 or 5 more coats of color and tried it again... same problem.... so I added 1 more thin layer of color and three thin layers of clear coat... tried it again... same thing???? What is going on? Is this normal or am I f'in something up?

please help


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Old 01-09-2008, 02:17 PM   #2
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when you wet sand color you will take off the shine you are actually sanding down the uneven spots by doing this your going to take off that shine... Essentially once you are finished wet sanding the piece should be extremely smooth if done right. Once you clear it you will get your shine back..
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Old 01-09-2008, 02:24 PM   #3
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ok, so I didn't do anything wrong then? I just need to apply another final layer of clear coat and don't wet sand correct?

edit.... you are able to wet sand clear coat to correct?
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Old 01-09-2008, 02:48 PM   #4
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yeah you are able to wet sand clear you just need to buff it to get the shine back out of it..

When i did mine i did 7 coats of clear and i did not wet sand the final coat.. it came smoooooooothh i got pics up in the how to thread if you wanna take a peak..
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Old 01-09-2008, 02:51 PM   #5
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nice, did you wet sand your final coat of color?
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Old 01-10-2008, 07:16 AM   #6
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How long are you giving it to dry before sanding? The paint should be completely cured before any sanding is done.
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Old 01-10-2008, 07:55 AM   #7
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The next step is called buff and cut. You gotta buff that with some buffing compound, an electric buffer and a wool buffer, working your way from heavy cutting compound to meduim to light then finishing with swirl remover. With such a small item you could probably go from medium to swirl remover. You are OK with the wet sanding if you don't have any color in the sanding residue, which means you are only hitting the clearcoat.
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Old 01-10-2008, 03:05 PM   #8
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A problem I see with your technique is that you are using a block with the sandpaper. This defeats the purpose of wetsanding.

The water helps evenly cling the paper to the surface you are sanding and gets rid of any paint dust from the sanding process.
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