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Old 08-02-2005, 01:59 PM
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Seal slick sand?

I am about to paint a 67 mustang coup with Nason bc/cc and I want to know if I need to seal this first. What we have is--Stripped to bare metal, sanded with 80 grit and primed with epoxy followed with Evercoat Slick Sand. Can the bc be applied to the Slick Sand after proper sanding or do we need to use a sealer or 2k primer/surfacer first? The original plan was to use a 2k urethane primer on the epoxy but after shooting the deck lid with the Slick Sand and seeing how easy this stuff is to work we decided to use it on the entire car. Was this a mistake? would we be better off to use the 2k urethane?

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Old 08-02-2005, 05:37 PM
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i would like to know the same thing, i have an epoxy base as describe above, but topcoated with pcl polyprimer (almost the same stuff) Do we need to seal the polyester primer?
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Old 08-02-2005, 05:42 PM
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I always block the slick sand with 180 than spray 2 coats of urethane with guide coat and block with 400. Barry said that the base will stick better to the urethane than slick sand.
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Old 08-02-2005, 06:08 PM
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This is a very good question.

Over the last couple of years some of the bodyfiller companies that make polyester primer (AKA spray bodyfiller) have started saying the polyester primer will accept basecoat or single stage paint without sealing the polyester first.

Will base or single stage stick to the polyester primer? Yes.
Will base or single stage stick to bodyfiller or glazing putty? Yes.

For the yes answer, how good? Not really good at all but of course there will be adhesion but the paint will be very susceptible to stone chips and scratching.

I would always have one of the following under the base and over the polyester. Either: 2K primer, two part urethane sealer or an epoxy as a sealer coat.
Its just pain cheap insurance.
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Old 08-02-2005, 08:33 PM
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Ok then I will use the urethane sealer.
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