how and when I use OBJ - STL format?

[3DPLUS]

how and when I use each format, because I use both regularly:

-Publishing a model online for the intent of others 3D-Printing it: STL

-Sending off a model for a colleague to work on: OBJ

-Saving a model for later use: OBJ

-Asking for someone's opinion of a model but don't want it being modified: STL

-3D-Printing my own personal design: STL

-Moving a model between CAD software: OBJ (biiiig time OBJ on this one, Fusion 360 absolutely HATES stl!)

-Publishing a 3D-Model on Thingiverse that has been 'remixed' and am leaving open for further modification: STL and OBJ : https://blogin3d.com/stl-vs-obj-nen-...ao-khi-3d.html

-Exporting a model for use in a game engine or separate rendering application: OBJ (solely for the texture mapping, STL would work too but without textures)

[magicniner]

The .stl format is not protection, there's an easy route from .stl to a conventional solid in the format of your choice using FreeCad, from there you can use FreeCad or the package of your choice to do what you like with the former .stl file,
Regards,
Nick

[jjpython]

Use either, neither is secure, both are just as good as each other imo