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Old 05-27-2007, 10:52 AM
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Best way to clean paint after wetsanding primer

I am going to be wetsanding my epoxy primer to get the body into semi-shape. I'd like to coat the body with two more coats, wet-sand again, then I will take the car off to the body shop.

(I just finished primering the doors and engine compartment. The body work looks like it turned out really nice, so far )

I could possibly wash the car, but am extremely concerned about trapping moisture inside the chassis, in places which will not dry completely. I am wondering if there is another way of doing this, such as localized cleaning with a misting bottle, rag, or particular cleaning solution.

After I am done the body shop is going to seal, paint the engine compartment, trunk, jambs etc, high build everything else.

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Old 05-27-2007, 11:17 AM
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Blow it off real good with the air hose, wipe with a surface cleaner followed with a dry rag, give it plenty of time to flash off, spray your primer. You can tack and blow again right before spraying if your anal about it.
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Old 05-28-2007, 05:10 AM
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Just my 2 cents. After I wet sand, I wash everything down with water with a bit of dishwashing soap. Once the car is dried, I dry sand the whole thing with 500 grit. Some will argue, but, wet sanding will get the panel nice and straight, but could leave marks from the edges of the paper even after soaking for an hour or so. Dry sanding will leave a smoother surface, and will show any imperfections that might have been missed when wet sanding. Dan
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Old 05-28-2007, 10:01 AM
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No wetsanding with dishsoap for me, seen fisheye's happen too many times and know of many others that have had the same. There's nothing wrong with final sanding wet, and as the last step you can give the whole surface a good rubdown with a grey scotchbrite wet or dry-helps perfect the surface for paint.
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Old 05-28-2007, 01:07 PM
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I think its a waste of time to wet sand primer/epoxy.

But since you are using this method a couple of pointers.

Dont use any dish soap. Use a 50% mix of water and rubbing alcohol.

Use a standard hair dryer to dry the surface.

x711
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Old 05-29-2007, 05:59 AM
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I always wash my panels down with "Dawn" dish soap before painting.
I have been for 20 yrs and I never use wax and grease remover
once they've been washed.
Dish soap is the best at wax silicone removal because you rinse it all away
unlike grease removers that most people just smear everything around.
I have never had a fish eye after using Dawn soap.
It has just about eliminated me from using any wax and grease remover.
I just don't need it anymore.
If you're getting fish eyes you're definetly getting it from something
other than the soap. It won't do that.
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Old 05-29-2007, 07:11 AM
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I agree!! I've been painting for years and NEVER get fish eyes after wet sanding with dish soap. By reading this thread, it proves that there's more than one way to get the surface prepped for paint. Just try the different processes listed here and pick the one that suits you best. As long as the end result is a flawless paint finish, who gives a $h!+ how you get there!! Having said that, I don't think I would wet sand using a 50-50 mix of water and alcohol.Dan
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Old 05-29-2007, 09:19 AM
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Everybody has their preferred ways, I have several.
I usually wet sand my 2K primer with just a garden hose running on it.
I like the wet sanding when it's hot out, when it's cold
I dry sand more.
I usually guide coat my primer with a rattle can and wet sanding seems
to keep it visible better, you don't have the dust hideing it.
But they all work, and which ever one you like the best will
obviously work the best for you.
It's not custom painting, it's custom sanding!!
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