I am completely new to Blender, outside of watching a few tutorials online and messing around for a couple hours trying to solve my problem.
I have this model, made by Yokiie on Sketchfab (https://sketchfab.com/models/9814e8f117c0426bbe3f04de7ad6a363), I am now trying to convert the file from .blend to .obj so I can send it to a 3D printer to make something for a cosplay. However, after exporting this model in Blender to an .obj file, the website I am using to send my project to a 3D printing service is telling me the walls of the model are too thin, as shown here in red.
Upon knowing this, I then tried the Solidify tool on Blender, and it minimally solved some of the thin wall issues (5% or so). However, upon making the walls thicker, it is also distorting other parts of the model (specifically the hand guard/round orb area), despite making a Verticies group with just the blade portion and using solidify on that.
I am just at a point where I don't know if there is something with the original model that is causing these problems or if there is another option. My end goal is to get the object into an .obj file so I can send it to a 3D printer through 3D Hubs.
I also apologize if this is answered somewhere and the answer becomes repetitive, I gave a quick look through google search and didn't find a result that I found to work. Soldify was the main method I saw people use and it didn't seem to work for me. Any help/tips/things to try would be greatly appreciated!