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Old 09-19-2003, 07:31 AM
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Wet sanding

On a base coat cleat coat system, What girt sand paper would you suggest to wet sand the base coat. Around 600? or maybe 1000? The clear will fill the tiny scratches so you wont be able to see them afterwards right? I suppose you dont want to go too fine of grit so that there is still a bit of a rough edge for the clear to adhere to right?

Please help me

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Old 09-19-2003, 10:40 AM
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The instruction sheet for PPG's DBU system does not have you sanding the base coat, unless you waited over 24 hours to apply the clear. Generally the clear is applied less than 24 hours after the final coat of base, usually within 45 minutes. PPG says that if you wait over 24 hours after the last base coat to apply clear, you must scuf the base coat and apply another coat of base, then apply clear.

To color sand one generally uses 1000 or 1500 grit paper. Scratches in the base WILL show through the clear.

Vince
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Old 09-19-2003, 10:45 AM
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Martin Senior also does not require sanding the base, as do many others- check your spec sheets to be sure or consult the seller, look it up on internet,etc. I think very few bases these days are sanded, making them baby smooth after clear.
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Old 09-19-2003, 12:55 PM
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Re: Wet sanding

Quote:
Originally posted by Mikey_mike
The clear will fill the tiny scratches so you wont be able to see them afterwards right?
You can leave your seeing-eye-dog home and still see the scratches if you clear over them. Clear makes a great magnifying glass. It will show everything.
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Old 09-19-2003, 01:02 PM
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Thanx all, i think i've been pointed to the right direction

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