I built a dang roof for the Jeep this week!
It took some experimenting but it turned out pretty good. I started by creating a template with thin strips of wood held together by hot glue. I then transferred the template onto a sheet of 6061 .100" aluminum. I tried cutting with a jigsaw w/ a lubricated soft metal blade (because that's what I read about on the internet). That didn't cut well so I switched to an angle grinder with a cheap cutoff wheel and that worked great. I then attempted rolling the front edge by clamping the sheet over a big pipe and dead blow hammering the heck out of it. When that didn't work, I brought the sheet to a local fab shop and they put a nice smooth roll in it for me.
I applied an adhesive backed 5mm thick foam headliner (boat flooring) to help with noise/rattles, heat from the sun, and aesthetics.
Lastly, I sanded the scratches out of the aluminum with 220, 320, 400, and then 600 grit on the orbital to give it a low maintenance satin sheen before applying a ceramic coating.
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