well working on a G-IV is not the most fun airplane to work on mainly because of the skydrol. gulfstreams are really prone to corrosion especially in the wheel wells (I've never seen another aircraft corrode as bad as I have seen some Gulfstreams), the flight controls are a pain to remove because of the cable back ups (especially on the tail when the horizontal stabilizer is still on), the fuel panels are a pain to remove as you will have a fun time removing all the fasteners and God help you if you strip them out on the inboard overwing wedge panels, also the flight control cable inspections are a pain in the butt. I do have to say that it is also a really big pain to remove the vertical and horizontal stabs when the bushings and straps corrode that holds the vertical to the fuselage. not sure what kind of car that would compare too.