Apologies if this type of situation was already encountered by someone else. Just could not find a solution for the life of me. Also please keep in mind that I am brand new to blender, so the more detailed explanation the better.
Essentially, I've created a model that has a head and hair, both separate objects from each other (probably not good practice). I tried using solidify on the hair to fill in the gap between the inside faces of the hair and the outside faces of the head, so that they meet up and don't leave any voids. Reason for doing this is I'm trying to 3D print it, and when I run the model through my slicer, I can see that those spaces are completely empty and actually have supports printing in order to make up the space, which I don't want.
Is there anything I can do at this stage of the model that would fix this problem? Or do I have to start from scratch and try a different approach? Obviously, I'd rather the former, but if I just truly botched this thing then I'm not entirely opposed to starting again and doing it the "right" way.
The only thing I can think is that I should've made the hair into an object with depth instead of a single plane of faces? But I don't really know how I would even approach doing that and still getting the look that I wanted.
This is the modeled head
The highlighted edge is the area between hair and head that I'd like to fill in (turned off solidify for a clearer image).
Edit: Figured out how to post the link. Modeled Head with Issues