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Old 09-04-2006, 10:35 AM
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Which primer?

I'll be painting my '72 GMC pickup with Dupont Centari acrylic enamel with gloss hardener. Before anyone shoots the Centari SS idea down, it's all I can afford at the moment with 1 gal of the original solid dark green and 1 qt. white colors already purchased. The body has been stripped down to bare metal and covered in rattle can primer to keep it from rusting. I will be removing the rattle can stuff and I'm wondering what primer(s) I will need to buy... ie. self etching, sealer, high build, sanding, epoxy, urethane This will be my first all over paint job. Any help is appreciated. Thanks fellas...

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Old 09-04-2006, 11:02 AM
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you will want ither a 2k epoxy primer or an etching primer. the place you bought the paint from should be able to get ither of them if it is not in stock.
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Old 09-04-2006, 12:35 PM
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Use epoxy only.. leave acid etch where it belongs.. in the past.. then you can 2k over that and topcoat it after it is final sanded
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Old 09-04-2006, 01:02 PM
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Thanks for the responses fellas, so, wipe down with precleaner, tack rag, epoxy prime the bare metal, let the epoxy cure, scuff sand with XXX? grit paper, wipe again and tack, shoot urethane primer over that, guide coat and block with XXX? grit, wipe again and tack then topcoat with the enamel? Does this sound right. Would you guys recommended using a tack rag to get the dust off?
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Old 09-04-2006, 02:41 PM
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Your right, get rid of the rattle can peimer. Then use some SPI self etching epoxy primer followed by some SPI 2K primer surfacer. Both of those are about as cheap as you can get and still use quality products.

Vince
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Old 09-04-2006, 06:26 PM
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Quote:
Originally Posted by PapaWrench
Thanks for the responses fellas, so, wipe down with precleaner, tack rag, epoxy prime the bare metal, let the epoxy cure, scuff sand with XXX? grit paper, wipe again and tack, shoot urethane primer over that, guide coat and block with XXX? grit, wipe again and tack then topcoat with the enamel? Does this sound right. Would you guys recommended using a tack rag to get the dust off?
Read your epoxy tech sheets. If you apply the urethane primer within the recommened "window" you don't need to sand it at all. Most will have a number of days after the epoxy to top coat it.

Blocking the urethane could be done with 180, then guide coat and sand with 400 prior to paint. OR, if you cut thru it a lot while blocking just apply another couple of coats of the urethane.

Brian
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Old 09-04-2006, 08:26 PM
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You guys are awesome! Thanks very much for the fast replies and good advice. Not sure if I will have time for the epoxy and urethane in one short weekend Brian. I have read all of your "BASICS" articles a while back and would like to print and laminate them as a reference. You should author a book or do a video. Vince, what is this "SPI"? Is it Southern Polyurethanes? I've read about them on this forum.
A little background for those interested:
I bought the truck in '95 and used it as a daily driver to and from work, and she was mechanically, very sound so I took her on a cross country trip to Death Valley, Ca. via Las Vegas (bro. lives there) and finally in 2000, the floor and other usual places were rusted through so it was time to either get rid of it or fix 'er up...Well she now has a fresh 383 SBC and rebuilt TH350 and many new suspension and driveline parts just awaiting the bodywork...
My GMC project has gone through more changes due to lifes little turns. I bought the Centari when times were tough and then, when things were on the upswing (financially) the plan changed to bc/cc in a cool metallic color custom wheels etc. and now were on the downswing again so I'm back to building the "poor-boy" pickup truck again. Someday she'll be back on the road again!
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Old 09-05-2006, 05:55 AM
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SPI is Southern Polyurethane, a great company with great products backed by a super helpful owner.

Vince
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