B
Bob Hollinshead
What type of resin was G.M. using for fiberglass reinforced molded parts back in 69? I've got some very rare pontiac parts to work on and I'm looking for a definitive answer if anyone knows. One part has a hack job repair that was done back in the 70's with only bondo that actually has held up just fine-adhesion was good suggesting to me that the part is polyester. The fiberglass repairs I've done on the pre-SMC cars always held up fine also leading me to believe polyester is 1969 fine. But.... with all the West Systems epoxy threads I've read here and a few other places I wonder if that's a better way to go? Still I wonder about expansion rate differences-I've seen many SMC spec'd repair materials show their ugly face when the sun is shining.