Polyurethane bushings for 1972 Formula Firebird
rojacques
02-20-2005, 10:17 AM
What are the best supplier options for the suspension poly bushing kits? Is it worth going to the poly engine and tranny mounts? Also what`s the best way of removing the paint from the rubber snout and preping before spraying? Any help will be greatly appreciated.
Rodolfo
Rodolfo
volkerc
02-20-2005, 11:00 AM
What are the best supplier options for the suspension poly bushing kits? Is it worth going to the poly engine and tranny mounts? Also what`s the best way of removing the paint from the rubber snout and preping before spraying? Any help will be greatly appreciated.
Rodolfo
i got the poly bushings on my car and would not change back to stock rubber at all, you will get a better handling ride, and they do not rot. I have mine on my car for 10 years now, and they still look like when I put them on. Removing the paint is a pain in the "a.."
Just sand it down until you get a good finish to paint, make sure you add flexible additive to the paint or you are damned....
I tried removing paint on a 79 front with some paint remover, all that did was damage and soften the plastic cover. On my 70 front I just filled the scratches and sanded by hand to get a a smooth finish. I would not use any machines as they quickly destroy the shape of the bumbers.So I personally sand front and rear bumpers by hand, it is worth the effort.
Rodolfo
i got the poly bushings on my car and would not change back to stock rubber at all, you will get a better handling ride, and they do not rot. I have mine on my car for 10 years now, and they still look like when I put them on. Removing the paint is a pain in the "a.."
Just sand it down until you get a good finish to paint, make sure you add flexible additive to the paint or you are damned....
I tried removing paint on a 79 front with some paint remover, all that did was damage and soften the plastic cover. On my 70 front I just filled the scratches and sanded by hand to get a a smooth finish. I would not use any machines as they quickly destroy the shape of the bumbers.So I personally sand front and rear bumpers by hand, it is worth the effort.
rojacques
02-21-2005, 11:27 AM
i got the poly bushings on my car and would not change back to stock rubber at all, you will get a better handling ride, and they do not rot. I have mine on my car for 10 years now, and they still look like when I put them on. Removing the paint is a pain in the "a.."
Just sand it down until you get a good finish to paint, make sure you add flexible additive to the paint or you are damned....
I tried removing paint on a 79 front with some paint remover, all that did was damage and soften the plastic cover. On my 70 front I just filled the scratches and sanded by hand to get a a smooth finish. I would not use any machines as they quickly destroy the shape of the bumbers.So I personally sand front and rear bumpers by hand, it is worth the effort.
Thanks for the advise. What did you use to fill in the scratches that adheres well to the rubber, bondo? Guess not because that sets quite rigid and as you said flexibility is a must.
Just sand it down until you get a good finish to paint, make sure you add flexible additive to the paint or you are damned....
I tried removing paint on a 79 front with some paint remover, all that did was damage and soften the plastic cover. On my 70 front I just filled the scratches and sanded by hand to get a a smooth finish. I would not use any machines as they quickly destroy the shape of the bumbers.So I personally sand front and rear bumpers by hand, it is worth the effort.
Thanks for the advise. What did you use to fill in the scratches that adheres well to the rubber, bondo? Guess not because that sets quite rigid and as you said flexibility is a must.
volkerc
02-21-2005, 01:32 PM
Thanks for the advise. What did you use to fill in the scratches that adheres well to the rubber, bondo? Guess not because that sets quite rigid and as you said flexibility is a must.
I sanded it down a lot, to get as close to the bumper itself ,then used flexible bondo.In one of those Pontiac magazines either Pontiac enthusiast or High performance Pontiac, they also had an article how to fix cracks in those early bumper covers, was fairly recent within a year or so...
I think there are also different bumpers out there from 70-73, flexibility wise. Mine was fairly "hard" difficult to push in and leave marks in the rubber, but soft enough to cause the paint to crack if no flexible additive was used.You want to make sure not to apply to much of the bondo, just use it sparingly, the more you buildup, the easier it will crack...
I sanded it down a lot, to get as close to the bumper itself ,then used flexible bondo.In one of those Pontiac magazines either Pontiac enthusiast or High performance Pontiac, they also had an article how to fix cracks in those early bumper covers, was fairly recent within a year or so...
I think there are also different bumpers out there from 70-73, flexibility wise. Mine was fairly "hard" difficult to push in and leave marks in the rubber, but soft enough to cause the paint to crack if no flexible additive was used.You want to make sure not to apply to much of the bondo, just use it sparingly, the more you buildup, the easier it will crack...
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