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Super Member
wet/dry sanding
One thing Mike said on one of his recent sanding videos was, that sanding was for single stage paint only. And if you sand any new production cars it would just kill the clear coat. Then I see a ton of videos where they are demonstrating dry and wet sanding on new cars with great success.
I posted this on Autofordge.
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Super Member
Re: wet/dry sanding
Originally Posted by
DanaDetailingPros
Then I see a ton of videos where they are demonstrating dry and wet sanding on new cars with great success.
I would be curious to know how that short-term great success plays out as time goes on. Isn’t one of the primary jobs of the clearcoat is UV protection?
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Super Member
Re: wet/dry sanding
Originally Posted by
BudgetPlan1
I would be curious to know how that short-term great success plays out as time goes on. Isn’t one of the primary jobs of the clearcoat is UV protection?
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I thought that same thing! I would guess that's the time to use a good LSP or coating. Still curious as well and like you said time will tell.
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Super Member
Re: wet/dry sanding
Just for clarification...
As far as I am aware, Mike never said that you can't, or shouldn't, sand clear coats; or that sanding is only for single stage paints. What I have heard him say is that sanding "factory" clear coats is not the best idea, and sanding should be reserved for repaints, single-stage or base coat/clear coat, that will typically have a paint film thickness greater than that of a factory finish.
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Super Member
Re: wet/dry sanding
I tried to find the film. I gave up! To Many. About a month back.
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Super Member
Re: wet/dry sanding
Originally Posted by
2black1s
Just for clarification...
As far as I am aware, Mike never said that you can't, or shouldn't, sand clear coats; or that sanding is only for single stage paints. What I have heard him say is that sanding "factory" clear coats is not the best idea, and sanding should be reserved for repaints, single-stage or base coat/clear coat, that will typically have a paint film thickness greater than that of a factory finish.
Not those words yes. But you described it perfectly.
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Re: wet/dry sanding
Sanding factory clearcoats is a bad idea. The uv protection is in the top of the thin clear. So while you can get away with it the chances are that eventually the clear will fail.
A repaint with multiple coats of clear is a different story. They often get wetsanded with 2500 and 3000 and then buffed.
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Super Member
Re: wet/dry sanding
Originally Posted by
DUBL0WS6
Sanding factory clearcoats is a bad idea. The uv protection is in the top of the thin clear. So while you can get away with it the chances are that eventually the clear will fail...
I've seen or heard this claim more than once and I just don't believe it. Do you have any technical or scientific information to support this claim?
Here's what I believe...
When the clear coat is applied, factory or otherwise, it is a homogenous mixture. Therefore, any UV protection properties of the clear coat will be present throughout the clear coat film thickness. If you sand off 25% of the clear coat film thickness, then you have reduced its UV protection properties by 25%. Sanding off 50% will result in a 50% reduction of the UV protection, and so on...
My comments are based completely on my own logic. I don't have any technical or scientific proof, but I would have to see such that states otherwise to change my perspective.
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Super Member
Re: wet/dry sanding
Originally Posted by
2black1s
I've seen or heard this claim more than once and I just don't believe it. Do you have any technical or scientific information to support this claim?
Here's what I believe...
When the clear coat is applied, factory or otherwise, it is a homogenous mixture. Therefore, any UV protection properties of the clear coat will be present throughout the clear coat film thickness. If you sand off 25% of the clear coat film thickness, then you have reduced its UV protection properties by 25%. Sanding off 50% will result in a 50% reduction of the UV protection, and so on...
My comments are based completely on my own logic. I don't have any technical or scientific proof, but I would have to see such that states otherwise to change my perspective.
I second this statement
Ripping through your mind like a hurricane full of novocaine
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Super Member
Re: wet/dry sanding
I trust the word from the painter. That makes sense to me
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