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Old 12-10-2007, 09:32 PM
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jelp with wavy panel..

hello people.well i have been working on the body of my truck super hard blocking and alot of it.well when i wet sanded it and put preclene ron it it looked f; that i paited it it looks wavy?why?

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Old 12-10-2007, 10:58 PM
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when you blocked it out did you press to hard so that the panel deflected under the sanding block...what length/type of block did you use????
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Old 12-10-2007, 11:20 PM
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could it possibly be a good case of urethane peel? Either that or it really wasn't straight as you thought, really hard to say for sure not being there and knowing how prep was done.
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Old 12-10-2007, 11:36 PM
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more often then not... waves are a result of changing sand stroke direction in the same place to many times.

Belive it or not sand paper cuts deeper there than mid stroke...

Once this concept is understood , everything changes and the bar is rasied another notch.

Until then waves are to be the norm


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Old 12-12-2007, 06:13 AM
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Milo, I like the way you analyze this stuff. And I agree, you need to carry your sanding pattern through from one end of the panel to the other and sometimes down the entire length of the vehicle when you're after those flawless results.
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Old 12-12-2007, 07:29 AM
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Use the longest block possible for the area,carry through and dont press too hard as they said, and sand at a 45 degree angle in both directions alternating as you go. I find this makes a big difference
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