it will crack.

Aint nobody, caulking, taping, lathering bondo on my Hondas. Good Grief!!!

Must set on the front porch and guard nice cars from the aero mod mad men... lolol

No, just commenting that if I did, the sticky stuff would look better than my paint.

I just caulked the seams, then waited for a day or two for the caulk to dry and then used a razor blade to slit a line down the caulk so I could open things that needed to be opened (doors, hood, gas cover, etc.). If you are careful with the razor work, the slit is completely invisible until you open the door, etc. Fortunately my car's color is white and matches the color of white caulk. The total FE improvement due to caulking the seams is probably minimal, but every little bit helps.

slice the caulk at an angle (under cut) and you end up with no gap - are you allowing for flexing of the body? If you tape over a gap with the adhesive only on the upwind side then you can still open everything. Make the tape a flap. I think teflon wax would help more . . . seems to work for airplanes.