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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


Bumper fillers. Paint

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Bumper fillers. Paint Empty Bumper fillers. Paint

Post by Damon23 Sat Aug 13, 2016 8:08 pm

Has anyone used high build primer on their bumper fillers? I was wondering if these things flex enough to cause a problem. Mine have these deep grooves in them that I cannot sand out. I'm getting into the black material they are made out of.

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Post by Joe73 Sat Aug 13, 2016 8:50 pm

I wouldn't use high build. It will probably crack. Body supply and some auto parts stores have a 2 part urethane bumper glue. You mix it like epoxy. It will fill your groove since its thick.
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Post by Damon23 Sat Aug 13, 2016 9:01 pm

Ah, didn't think about that stuff. I've got some low spots too. I know they are not going to be smooth as glass. Anything will be better.

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Post by fasrnur Sat Aug 13, 2016 9:37 pm

They make a flexible spot putty just for bumpers that would work for what you're trying to do Damon. Then prime it with a 2 part urethane primer/sealer. Sand and paint to your liking.
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Post by g3chevy / Mr Pontiac Sun Aug 14, 2016 7:27 pm

I restored my 75 Laguna bumper fillers with 3M Flexible Parts Repair filler. Just make sure that you scrape off any urethane that is sticky and white from the bumper filler before you apply any repair compound. This white sticky layer is degraded urethane that will eventually come off. This will make any repair short lived. I used a dull razor to scrape it off my bumper fillers as sandpaper clogs immediately. I also reinforced the flat part under the license plate with a piece of urethane cut out of a 79 Trans Am nose. This made the part much more rigid and less likely to sag over time. Here are a few pics.

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Post by crice63 Mon Aug 15, 2016 1:45 pm

Nice work.

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Post by Joe73 Mon Aug 15, 2016 5:10 pm

And also. http://www.autozone.com/sandpaper-and-body-repair-tools/body-repair-and-accessories/bondo-1-oz-epoxy-flexible-bumper-repair-compound/69590_0_0/
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