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  #1  
Old 05-16-2007, 11:21 PM
 
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wet sanding?

Planning on wet sanding my car. Red paint, no clear coat. The paint is rather faded and has a lot of swirls and oxidation.
Anyway, i have some 2000 and 2500 grit paper now.
What steps would you use to sand? back and forth? + up and down?
After the car is sanded down, which polish would you start with right after sanding?
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Old 05-16-2007, 11:37 PM
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Doesn't matter what direction really. Just don't use ANY pressure at all and rinse the paper very, very often. Don't know what I'd recommend after that. I'd look and see what it looks like first then decide.
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Old 05-23-2007, 08:01 AM
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How many times have you buffed the car out? The reason I ask this is because the paint may be very thin in some spots. everytime you buffed it it is taking of some paint. You have to be careful when wet sanding a single stage paint. Even with 2000 or 2500 you can still fuck it up. Trust me I have experience with sanding through. Especially on the edges. And if I remember correctly Corrados have some edges.

My advice would be to wash it down and clay bar the car. You will even see pait come off on the clay bar. Get the car as smooth as possible, Get all the old wax off and start with a fresh base. Before you start getting into wet sanding try using different grit compounds. It is the same principle as wet sanding. Use course to fine. And for the swirls, I always use 3m swirl mark remover with the black honeycomb pad. Then put a coat of wax on. Try this in a small spot and see how it turns out. I dont know how bad the oxidation is on your car but to get it completely out, you probably would have to take off some paint and you dont want to do that. The oxdation on my BMW wasnt even that bad. I used 1500 and it still was there. That is why I dont recomend wet sanding.

PS Take off all your mouldings with some painters tape. It takes a bit but saves you in the long run. Also when buffing the hood, pop it open just leave it sit about the fneders. That way you dont burn the edges on the fenders. You could also tape eges on corners too..
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Old 05-25-2007, 10:28 AM
 
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The wet sanding in question will be on my '87 4000Q. This car also has no clear coat. Im farily certiain that it has never been sanded or buffed in its life. One of my questions is what grit compound to use following sanding?
Thanks for your tips so far. I will be sure to tape off the car very well.
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