Most crapcan racecar builds involve some form of shared shop space, be it with other teammates or with other amateur racing types who have a shop. Here's some advice on how to finish your car while keeping your (and their) sanity intact.
See, when you buy a hooptie racecar, you need a place to work on it. When teammates get involved, you have to share your work space. When you're on your last nerve with a bolt that won't come loose, you feel like stabbing things. When you stab your teammates, you end up in jail with "Big Bertha" as a cellmate and the slipperiest soap-on-a-rope you've ever seen. Don't stab your teammates, and don't drop the soap.