I have a couple of cracks and one small piece broken off an interior rear side panel in my '69 convertible and am looking for experiences and opinions on how to repair without actually making the damage worse. Several years ago, I had a good result on a similar project hiring an experienced plastic welder but I have had no luck finding a shop or an individual with that skill where I now live. Any experience out there using an off-the-shelf epoxy adhesive (or similar) that would work for a "DIY' fix? I'm getting closer and closer to sending it off to a qualified plastic welder but kinda nervous about shipping damage. Would appreciate ideas.....