I gotta few I can contribute to this one, I'm embarrased to say just how long some of these have been in process.
64/67 Impalla, started this one probably over a decade ago... long enough that I would probably do it differently now, and I'm at that point to see If I should start over, or fix it. This one always gets put back away before I decide
S10 I started a while ago too, ended up not liking the chassis mods I did, and it stalled.
62 impalla got this far with it, then decided I didnt like it, so it hit the purple stuff and is back in primer again.
I have many more that still havent even made it to the primer stage.
This one is finished now, but I always liked how it looked in primer