is it necesary to sand epoxy primers prior to topcoating? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 10-03-2006, 05:48 PM
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is it necesary to sand epoxy primers prior to topcoating?

Im planning on using PPG Omni basecoat over PPG DPLF Epoxy primer,

the specs for the base say...

Sanding: 400 on old finishes and primer surfacers...

does this mean i dont have to sand down the epoxy primer?

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Old 10-03-2006, 06:35 PM
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No you do not need to sand the epoxy as long as you base within the window they give for the epoxy.
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Old 10-03-2006, 07:00 PM
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what if the epoxy turns out having terrible orange peel?
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Old 10-03-2006, 07:04 PM
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Then you have no choice but to wet sand or dry sand the epoxy smooth.

Some epoxies sand good some don't.
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Old 10-04-2006, 06:37 PM
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Hey Barry wouldn't spraying a product lick slick sand over the epoxy be another way?? I used slick sand over epoxy primer and it sands very very nice.

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Old 10-04-2006, 07:04 PM
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Agree, if the epoxy was rough over the bare metal something like slick sand will take care of it with no problems and would not worry about sanding the epoxy first.

I think in this case the epoxy is being used as a sealer and body work is done so he will need to sand it smooth to apply base coat.
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Old 10-05-2006, 06:50 PM
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Nessicary, No.
Good idea, Yes.

I've said it a few times here. Quickly running over epoxy as a sealer with 800 wet is not much work for the return. When you blow your base you want the slickest possible surface. As KOOL as epoxy is it does not lay as smooth as I want it to be. And there's always a spec-o-trash or two.

Last edited by colormecrazy; 10-06-2006 at 06:21 PM.
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