I followed your instructions and everything worked until I got to the array modifier at the end. I couldn’t figure out how to spin the array instead of having it go in a straight line, so just spun the lobe once it was mirrored and that worked fine. I also had some problems applying the subsurface (had to use simple, since catmull-clark did the same petal-edge thing as my original model) and solidifying the cup (it seemed to extrude along the normals, leaving me with gaps between each lobe) but I can worry about finishing techniques later on.
Modeling from scratch was a great solution considering I needed each lobe to be precisely the same, but now I’m having a similar problem as before in terms of needing to sculpt my model: I would like each lobe to have an arced cross section. That is, something more like a pumpkin. I experimented with scaling/grabbing vertices in all sorts of combinations (proportional editing/pivot points/transform orientation/influence area) which is essentially what I resorted to with my first model, and what you were showing me how to avoid. It proved pretty impossible to do this with any sort of regularity, but it seems like it would be equally impossible to apply some kind of profile along the surface.
Any ideas how to arch the lobes without hand-modeling?
Separately, should I move this conversation over to the project thread, since it’s gotten past the subject of the original post?