Object Detection on Simpler and/or Smaller Objects

Currently I've been having issues with some objects and I'd like to know if there's a better alternative to address this kind of cases:

- Glossy mugs (I tried to create a 3D Target after properly scanning it and it couldn't detect it, then I was going to try it as a cylinder but it looks like I have to put the textures of the mug, and since its a particular mug with some strange paintings I dont think I can do it..?);

- Tiny objects (I was trying to scan a proximity sensor (which also has some refflexive parts) and it went very poorly).

I even tried with 1 layer of tape to remove reflectiveness but the problem remained. So far things only went well with big, diffuse and unique objects (my wallet being an exception, which ended up perflect fine even though its a very basic wallet).

In case you're asking yourself why I'm picking so many different/random objects, I was trying to have a perception of the detection limits of Vuforia to check if it's a possible solution for my use case.

Thank you so much for reading and taking your time to help me out, I really appreciate it.