Sanding between clear coat. Wet or dry. Does it matter?

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danford1

I was reading about sanding between clear coats. Like spray on 3 coats, let dry, then block sand with 600 and spray on a couple more. Then cut and buff.
My question is about sanding scratches. Are the scratches the same if sanded wet or dry?

Danford1
 
Do it wet for the reason is, the clear in this process is not fully cure and you could end of with gouging .
 
Just currious..as I was block sanding after I sprayed down my third coat of clear,I was wondering.
What will these first three coats of clear do now that I have taken away the gloss? Will the final coat of clear be as if it's only one coat of clear?
Does laying down one coat of clear over another coat of clear without any sanding in between achieve more depth and gloss?
Or, will the first three coats add depth and protection of the color and allow the buffing and polishing for custom work?
 
No same principal as spraying over a dull base and next panel is glossy base, it will look the same when cleared so the first three coats do add to the depth and gloss and an additional benefit is the UV's in the first three coats are locked in from floating, so life is extended.

The draw back is this, your first dried coats do not count for buffing, like the old lacquer days when we might do 7 coats one saturaday and 7 more coats for three more weeks, they melted and the total counted as 28 coats or One.
If you did 10 coats of urethane or polyurethane and let dry only the last set of coats count for buffing, so if you buff through to the dried clear you will see a hallo.
That is why most shops that do this do 3 and 3. 3 and 1 would be a problem
 
Barry, I dont quite understand the part of your response that says "do 3 and 3.3 and 1 would be a problem". Can you explain that a little more?
 
If you do 3 and sand then do 1. You will be cutting and buffing on a thin coat do 3 sand then a min of 2 .
 
I understand now about the 3 and 3. Thanks for you input!
 
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