Ken I just spent the last few hours and read this thread from the beginning...my eyes are tired but here are a few thoughts.
Awesome job staying with it through the trials and tribulations, believe me I know how hard that can be at times, especially without a good local support network (thank god for SM huh?). You are doing the right thing taking it easy, ya just never know on a new car and you need to build confidence with it before doing anything crazy (not that you strike me as the crazy type).
Those stripes may come off with a heat gun if they are a vinyl base, or you might try using a good variable speed buffer and something like Mequires Diamond Cut to basically scrub them off. You can probably use the same process on that stuff on the front bumper. Other than that looks like you are well on your way to a nice example of a saved from the dead supra with the added benifit of boost. I know thats gotta feel good.
Take care of your back and do your physical therapy to minimize the scar tissue and you should be able to make a full recovery.
Anyway, just wanted to pop in and congratulate you on a job well done.